PUBLISHED OPINION
Case No.: 95-2493
†Petition for
review filed.
Complete
Title
of
Case:UNITED PARCEL
SERVICE CO.,
Petitioner-Appellant,†
v.
WISCONSIN DEPARTMENT OF REVENUE,
Respondent-Respondent.
Submitted
on Briefs: March 11, 1996
COURT COURT OF
APPEALS OF WISCONSIN
Opinion
Released: July 31, 1996
Opinion
Filed: July
31, 1996
Source
of APPEAL Appeal from an order
Full
Name JUDGE COURT: Circuit
Lower
Court. COUNTY: Dane
(If
"Special" JUDGE: Daniel
R. Moeser
so
indicate)
JUDGES: Dykman,
Sundby and Vergeront, JJ.
Concurred:
Dissented:
Appellant
ATTORNEYSFor the petitioner-appellant the
cause was submitted on the briefs of David D. Wilmoth of Quarles
& Brady of Milwaukee, and Richard D. Birns of Philadelphia,
PA.
Respondent
ATTORNEYSFor the respondent-respondent the
cause was submitted on the brief of James E. Doyle, attorney general,
and Gerald S. Wilcox, assistant attorney general.
COURT OF
APPEALS DECISION DATED AND
RELEASED July
31, 1996 |
NOTICE |
A party may file with the Supreme Court a petition to review an
adverse decision by the Court of Appeals.
See § 808.10 and Rule
809.62, Stats. |
This opinion is subject to further editing. If published, the official version will appear in the bound
volume of the Official Reports. |
No. 95-2493
STATE OF WISCONSIN IN
COURT OF APPEALS
UNITED
PARCEL SERVICE CO.,
Petitioner-Appellant,
v.
WISCONSIN
DEPARTMENT OF REVENUE,
Respondent-Respondent.
APPEAL
from an order of the circuit court for Dane County: DANIEL R. MOESER, Judge. Affirmed.
Before
Dykman, Sundby and Vergeront, JJ.
VERGERONT,
J. United Parcel Service Company
(UPSCO) appeals from a trial court order affirming a decision of the Wisconsin
Tax Appeals Commission. The Commission
upheld UPSCO's franchise tax assessments for 1985 and 1986 imposed by the
Wisconsin Department of Revenue using the apportionment formula under Wis. Adm. Code § Tax 2.46.[1] UPSCO contends: (1) the apportionment formula, as applied by the Department,
violated the Due Process and Commerce Clauses of the United States Constitution
because one of the factors used in the apportionment formula (the arrivals and
departures factor) is unrelated to UPSCO's Wisconsin income, and the use of
that factor attributed income to Wisconsin out of all appropriate proportion to
the business transacted in Wisconsin; (2) the Department erroneously refused to
modify the arrivals and departures factor under § 71.07(3) and (5), Stats., 1985-86; and (3) Wis. Adm. Code § Tax 2.46 should be interpreted to
require the arrivals and departures factor to be calculated using the takeoff
and landing weight of arriving and departing aircraft, rather than the raw
number of such aircraft. We reject each
of these contentions and affirm.
BACKGROUND
The
following facts were stipulated by the parties. UPSCO is a Delaware corporation that provides a national and
international air transportation service for small packages. During the years at issue, 1985 and 1986,
UPSCO transacted business in Wisconsin and derived income from such business
activity.
UPSCO
provides service using seven different types of aircraft. In 1985 and 1986, UPSCO used its smallest
aircraft--the Fairchild Expediter--almost exclusively for Wisconsin flights. That aircraft has a maximum payload of 4,450
pounds.[2] Although Fairchild Expediters represented
only 21 percent of UPSCO's flights overall during those years, they accounted
for 89-92 percent of flights arriving or departing in Wisconsin.
UPSCO's
charges for transporting an air package are a function of the level of service
(i.e., next-day service, second-day service), the weight of the package and the
destination. The average weight of
packages picked up and delivered in any geographical region is uniform. Similarly, the distribution of the levels of
service and the destinations of packages do not vary significantly by the
geographical origin of packages.
Accordingly, the dollar amounts UPSCO receives from its customers, both
overall and within any particular geographical area, are a function of the
number of packages transported.
Similarly, UPSCO's expenses, both overall and within any particular
geographical area, are a function of the number of packages transported.
As
an air carrier, UPSCO is a "public utility" for purposes of the
Wisconsin franchise tax. The
determination of what portion of a public utility's income is subject to
franchise tax assessment is governed by § 71.07(2)(e), Stats., 1985-86,[3]
which provides:
The net business
income of ... public utilities [that conduct business both within and without
the state] shall be apportioned pursuant to rules of the department of revenue,
but the income taxed is limited to the income derived from business transacted
and property located within the state.
The
Department has adopted a specific rule regarding apportionment of the income of
interstate air carriers. Wisconsin Adm. Code § Tax 2.46 provides that such income
should be apportioned using a three-factor formula. The formula takes the average of three ratios: (1) the ratio of aircraft arrivals and departures
within the state to total aircraft arrivals and departures; (2) the ratio of
revenue tons handled in the state to total revenue tons; and (3) the ratio of
originating revenue within the state to total revenue. The resulting figure represents the
percentage of the public utility's income subject to the Wisconsin franchise
tax.
In
preparing its 1985 and 1986 Wisconsin franchise tax returns, UPSCO calculated
the arrivals and departures factor in those years using the takeoff and landing
weight of arriving and departing aircraft rather than the raw number of such
aircraft. This was done to account for
the much more frequent use of small aircraft in Wisconsin. UPSCO believed that a factor based on unweighted
arrivals and departures distorted its Wisconsin business activity and income. UPSCO's calculations resulted in an arrivals
and departures ratio of .707789 percent in 1985 and .816660 percent in 1986.
In
an audit of UPSCO, the Department of Revenue deleted takeoff and landing weight
from UPSCO's computation of the arrivals and departures factor and calculated
the factor based on the raw number of arriving and departing flights. The Department calculated an arrivals and
departures ratio of 6.167805 percent for 1985 and 4.437488 percent for 1986.[4] Consequently, the arrivals and departures
factor used by the Department for 1985 was 8.7 times that reported by
UPSCO. The factor used by the
Department for 1986 was 5.4 times that reported by UPSCO. The use of the raw number of arrivals and
departures, as opposed to a factor based on takeoff and landing weight: (1) increased UPSCO's average apportionment
factor from 1.67 percent to 3.47 percent in 1985, and from 1.58 percent to 2.79
percent in 1986; (2) increased the income apportioned to Wisconsin for 1985 and
1986 by 110 percent and 76 percent, respectively; and (3) increased UPSCO's
Wisconsin franchise taxes from $299,527 to $546,939 in 1985, and from $445,733
to $748,837 in 1986.
After
the Department denied its petition for redetermination, UPSCO appealed its
franchise tax assessments for 1985 and 1986 to the Wisconsin Tax Appeals
Commission, raising three arguments.
First, UPSCO argued that the apportionment formula, as applied by the
Department, violated the Commerce and Due Process Clauses of the United States
Constitution because the unweighted arrivals and departures factor was
unrelated to UPSCO's income and its use attributed to Wisconsin an amount of
income that was out of all appropriate proportion to UPSCO's business
activities there. Second, UPSCO argued
that it was entitled to relief under § 71.07(3) and (5), Stats., 1985-86, which, according to
UPSCO, permit the Department to depart from standard methods of apportionment
where such methods would produce an unfair or inequitable result. Third, UPSCO argued that Wis. Adm. Code § Tax 2.46 should be interpreted to
require a weighted, rather than an unweighted, arrivals and departures
factor. UPSCO noted that the Department
itself had interpreted the formula in this manner from the date Wis. Adm. Code § Tax 2.46 was adopted until 1980, when
the Department reversed its interpretation on the basis of a decision from the
Dane County Circuit Court.
The
Tax Appeals Commission affirmed the assessments. Relying on Consolidated Freightways Corp. v. DOR,
164 Wis.2d 764, 477 N.W.2d 44 (1991), the Commission held that an average
variance of 1.5 percent between the parties' disputed methods in the percentage
of UPSCO's income apportioned to Wisconsin for the two years in dispute did not
"clearly and cogently" show that the apportionment was "out of
all appropriate proportion to the business transacted in [this] state" nor
that it had "led to a grossly distorted result." The Commission did not address UPSCO's
arguments regarding § 71.07(3) and (5), Stats.,
1985-86, or how Wis. Adm. Code § Tax 2.46 should be interpreted.
The
trial court affirmed the Commission.
The trial court also concluded that § 71.07(3 ) and (5), Stats., 1985-86, did not apply to
UPSCO, and that Wis. Adm. Code
§ Tax 2.46 cannot be read to
provide for a weighted arrivals and departures factor.
STANDARD OF
REVIEW
In
Consolidated Freightways, the supreme court held that the
question of whether the Department's application of a related apportionment
formula, Wis. Adm. Code § Tax 2.47, to an interstate motor
carrier violates a state statute or the Due Process and Commerce Clauses of the
United States Constitution is a question of law which a reviewing court may
decide without giving any deference to the interpretation of the Department or
the Commission. The court stated:
Though the Department has experience in applying the Tax 2.47 formula to motor carriers, we
agree with the court of appeals that the issue of whether Tax 2.47 as applied to Consolidated
violates sec. 71.07(2)(e), Stats.,
is a question of law in which neither the Department nor the Tax Appeals
Commission has evidenced any special expertise or experience. The Department's use of the Tax 2.47 formula does not by itself
establish the Department has pursued a "course of uniform interpretation
over a period of time." Routine
and mechanical application of a formula does not equate with interpretation of
its underlying legality. Thus, this
court will afford no deference to the Department's or the Tax Appeals
Commission's interpretation in this case.
Consolidated Freightways, 164 Wis.2d at 772, 477 N.W.2d at 47 (citation
omitted).
Following
the rationale in Consolidated Freightways, we review the issues
raised by UPSCO de novo.
DUE
PROCESS AND COMMERCE CLAUSES
UPSCO's
primary argument is that the Department's use of an unweighted arrivals and
departures factor caused the apportionment formula, as applied to UPSCO, to
violate the Due Process and Commerce Clauses of the United States Constitution
because: (1) the unweighted factor is
not reasonably related to UPSCO's income, and (2) the formula attributed income
to Wisconsin out of all appropriate proportion to the business transacted in
the state. UPSCO contends that because
its income is a function of package volume and an unweighted arrivals and
departures factor has no definite relationship to package volume, the factor
does not bear a reasonable relationship to UPSCO's business.
State
taxation of business income earned in interstate commerce must be consistent
with the Commerce Clause and the Due Process Clause of the Fourteenth
Amendment. Mobil Oil Corp. v.
Comm'r of Taxes, 445 U.S. 425, 436-37 (1980); Complete Auto
Transit, Inc. v. Brady, 430 U.S. 274, 274-75 (1977). As a general rule, a state cannot tax value
earned beyond its borders. Container
Corp. v. Franchise Tax Bd., 463 U.S. 159, 164 (1983). However, a state tax applied to interstate
commerce does not violate the Commerce Clause if the tax: (1) is applied to an activity with a
substantial nexus with the taxing state; (2) is fairly apportioned; (3) does
not discriminate against interstate commerce; and (4) is fairly related to
services provided by the state. Complete
Auto Transit, 430 U.S. at 279.[5] The dispute in this case concerns only the
second factor: whether the franchise
taxes imposed on UPSCO were fairly apportioned.
To
be fairly apportioned, the tax may only be imposed on income earned from
business conducted within Wisconsin.
However, states have wide latitude in the selection of a formula used to
apportion the income of an interstate business. Moorman Mfg. Co. v. Bair, 437 U.S. 267, 274
(1978). The Constitution imposes no
single formula upon the states. A.T.
& T. v. DOR, 143 Wis.2d 533, 550, 422 N.W.2d 629, 636 (Ct. App.
1988). A formula-produced assessment
will only be disturbed when the taxpayer has proven by "clear and cogent
evidence" that the income attributed to the state is in fact "out of
all appropriate proportion to the business transacted in that state" or
has "led to a grossly distorted result." Moorman Mfg. Co., 437 U.S. at 274.
In
Consolidated Freightways, the supreme court addressed a similar
challenge to an apportionment formula applied by the Department for interstate
motor carriers. Consolidated
Freightways was a general commodity motor carrier transporting small shipments
throughout the country. The Department
imposed franchise taxes on Consolidated Freightways using Wis. Adm. Code § Tax 2.47, which provides a two-factor
apportionment formula for motor carriers conducting business in Wisconsin. The formula adds (1) the ratio of gross
receipts from carriage of goods first acquired in Wisconsin--the
"originating" or "outbound" revenues--to gross receipts
from carriage of goods everywhere, and (2) the ratio of ton miles of carriage
in Wisconsin to ton miles of carriage everywhere, and then divides the total by
two. The final figure represents the
percentage of the company's income subject to the Wisconsin franchise tax.
Consolidated
Freightways challenged the application of the apportionment formula on the
grounds that it reached income earned by the company in other states in
violation of § 71.07(2)(e), Stats.,
1985-86, and the Commerce and Due Process Clauses of the United States
Constitution. Specifically,
Consolidated Freightways claimed that because of the nature of its
business--hauling shipments long-distance and earning income on a given
shipment from the entire multistate journey--the apportionment formula's use of
outbound or originating revenue in the first factor apportioned too much of its
income to Wisconsin. Consolidated
Freightways argued that the outbound revenue factor measured activity in other
states because the income for a shipment was earned not merely by activities in
Wisconsin but also by activities in other states. Consolidated Freightways, 164 Wis.2d at 771, 477
N.W.2d at 47.
The
supreme court concluded that the apportionment formula as applied to
Consolidated Freightways taxed only income derived from business transacted
within the state and did not violate § 71.07(2)(e), Stats., 1985-86, the Commerce Clause or
the Due Process Clause. The court first
stated that there are two steps involved in analyzing a tax on an interstate
business: (1) whether the operations of
the business are such as to subject it to taxation under § 71.07(2)(e),
1985-86; and (2) if so, whether the tax upon such income violates the Commerce
and Due Process Clauses. The court
concluded that the tax imposed on Consolidated Freightways satisfied the first
step of the test because Consolidated Freightways' activities in Wisconsin,
consisting of transporting goods to, from and through terminals located in
Wisconsin, and the management and consolidation activities engaged in at the
terminals, produced income for the business.
Consolidated Freightways, 164 Wis.2d at 777, 477 N.W.2d at
49.
With
respect to the second step of the analysis, the court applied the four-part
Commerce Clause test, see Complete Auto Transit, Inc. v. Brady,
430 U.S. 274 (1977), the second part of which asks whether the tax is fairly
apportioned. In evaluating whether the
tax was fairly apportioned, the court did not focus on whether the single
challenged factor in the apportionment formula (originating revenue) was
reasonably related to the taxpayer's Wisconsin income. Rather, the court looked at whether the
formula, using all of the factors, attributed income "out of all
appropriate proportion to the business transacted ... in that State," or
has "led to a grossly distorted result." Consolidated Freightways, 164 Wis.2d at 780, 477
N.W.2d at 50-51 (citing Moorman Mfg. Co., 437 U.S. at 274).
The
court concluded that a 1.1 percent variance between the percentage of
Consolidated's income apportioned to Wisconsin by the Department using Wis. Adm. Code § Tax 2.47 and by Consolidated using its own formula did not
"clearly and cogently" show that the apportionment under Tax 2.47 was out of all appropriate
proportion to the business transacted within this state, nor that it had led to
a "grossly distorted" result.
Consolidated Freightways, 164 Wis.2d at 781, 477 N.W.2d at
51.[6]
UPSCO
does not dispute that its operations are such as to subject it to taxation
under § 71.07(2)(e), Stats.,
1985-86, so we address only the second step of the analysis in Consolidated
Freightways. Applying that
analysis, we conclude UPSCO has failed to meet its burden of proving by clear
and cogent evidence that the apportionment formula, as applied by the
Department, attributed income to Wisconsin "out of all appropriate
proportion" to the business transacted in Wisconsin, or "led to a
grossly distorted result." As
noted by the trial court, the average variance in the percentage of UPSCO's
income apportioned to Wisconsin between the parties' disputed methods in the
years 1985 and 1986 is approximately 1.5 percent. In light of Consolidated Freightways' conclusion
that a 1.1 percent increase was constitutionally acceptable, we cannot conclude
that a 1.5 percent increase constitutes clear and cogent evidence that the
apportionment formula under Wis. Adm.
Code § Tax 2.46, as
applied to UPSCO, is unconstitutional.
UPSCO
argues that because it conducts business in all fifty states, the percentage of
income apportioned to any one particular state is low. Consequently, a small numerical increase in
its apportionment percentage has a large effect on its taxable income. UPSCO points out that the increase of 1.5
percent in the percentage of income attributable to Wisconsin resulted in an increase
in the amount of its income apportioned to Wisconsin of 110 percent for 1985
and 76 percent for 1986. UPSCO contends
that a comparison should be made between the income attributed to the state by
the disputed formula and by the taxpayer's alternative, not between the
percentage of the taxpayer's total income attributed by the two formulas. While other jurisdictions follow the
approach proposed by UPSCO, see, e.g., Gen. Dynamics Corp. v.
Sharp, 919 S.W.2d 861, 868-69 (Tex. Ct. App. 1996), we conclude that we
should follow the analysis set out by our own supreme court in Consolidated
Freightways. The taxpayer in Consolidated
Freightways also conducted business in all fifty states and the court
nonetheless applied a
percentage-increase analysis.
UPSCO
relies on W.R. Arthur & Co. v. Dep't of Taxation, 18 Wis.2d
225, 118 N.W.2d 168 (1962), cert. denied, 374 U.S. 94 (1963), for the
proposition that we must look at the arrivals and departures factor in
isolation and determine whether that factor bears a reasonable relationship to
its Wisconsin income. In UPSCO's view,
this determination must be made in addition to examining whether the formula as
a whole produces a fair apportionment.
W.R.
Arthur was an interstate trucking company, organized under Illinois law with
its corporate offices in Janesville, Wisconsin. Its principal activity was the delivery of automobiles
manufactured in Janesville to dealerships in eleven states, including
Wisconsin. It served only one client,
the General Motors Corporation. W.R.
Arthur challenged the Department's apportionment formula which consisted of
three factors: revenue miles, payroll
and originating revenue. Specifically,
W.R. Arthur argued that the originating revenue factor was arbitrary and
improper because, as all of its carriage was outbound, the originating
revenue factor equaled its gross receipts and the formula therefore taxed
services performed by the taxpayer outside of the state. The taxpayer did not challenge the other
factors used in the formula.
The
W.R. Arthur court stated that "[w]hen a multifactor formula
is used, each factor must bear a reasonable relationship to the taxpayer's
business and to the other factors of the formula; it must also produce a fair
apportionment when set in combination with other germane factors. The test is not whether, standing alone, a
given factor produces a fair apportionment." W.R. Arthur, 18 Wis.2d at 232, 118 N.W.2d at
171. The court concluded that including
100 percent of gross receipts as one factor in a three-factor formula
constituted a reasonable means of reflecting the company's income attributable
to Wisconsin. The formula took into
account the "peculiar nature of [the taxpayer's] business activity"
and the fact that the taxpayer's one and only customer was in Wisconsin and the
taxpayer was headquartered in Wisconsin.
The court then stated:
If used as a
single factor, gross receipts would result in all of the taxpayer's income
being taxed here, and this would obviously constitute an unfair tax. However, when it is used in conjunction with
the two other factors, it cannot be said to be arbitrary or to result in an
unfair apportionment.
W.R. Arthur, 18 Wis.2d at 231, 118 N.W.2d at 171.
In
the court of appeals' opinion in Consolidated Freightways Corp. v. DOR,
157 Wis.2d 65, 458 N.W.2d 550 (Ct. App. 1990), rev'd, 164 Wis.2d 764,
477 N.W.2d 44 (1991), we looked, as the court did in W.R. Arthur,
at whether the single challenged factor (originating revenue) bore a reasonable
relationship to the taxpayer's business.
We first stated that, unlike the taxpayer in W.R. Arthur,
whose only customer, management staff, employees and offices were located in
Wisconsin, Consolidated Freightways was not headquartered in Wisconsin and only
13 of its 410 terminals were located in Wisconsin. We next explained that the use of the outbound revenue factor
exaggerated Consolidated Freightways' Wisconsin income because it assumed that
outbound and inbound revenues were equal indicators of activity within the
state, when in fact the evidence established that carriers were more heavily
laden going out of Wisconsin than coming in, and that freight revenues were
higher outbound. We also stated that
because the originating revenue factor attributed the entire journey to
Wisconsin, it measured Wisconsin income by activity in other states. Id. at 74-75, 458 N.W.2d at
554-55. We therefore concluded that the
apportionment formula, as applied to Consolidated Freightways, violated
§ 71.07(2), Stats., 1985-86,
by taxing extraterritorial income. We
did not look at the validity of the apportionment formula as a whole.
However,
in reversing our opinion in Consolidated Freightways, the supreme
court did not follow our analysis. The
court did not examine whether the single challenged factor bore a reasonable
relationship to the taxpayer's business.
Rather, the court looked at whether the overall apportionment formula
produced a fair apportionment.
Following Consolidated Freightways, the focus of inquiry
is on the apportionment formula as a whole, not on a single factor.
Moreover,
even if the arrivals and departures factor were looked at in isolation, we
would conclude it bears a reasonable relationship to the taxpayer's
business. UPSCO is in the business of
providing an air transportation service for small packages. UPSCO's activities in Wisconsin consist of
flying into and out of the state.
Whether weighted or not, these activities produce income for UPSCO. While a weighted factor might produce a more
precise representation of UPSCO's income-generating activities in Wisconsin,
this does not mean that the unweighted factor is not reasonably related to
UPSCO's business activities in Wisconsin.
SECTION 71.07(3) and (5), Stats., 1985-86
UPSCO contends the
Department erroneously refused to grant it relief under § 71.07(3) and
(5), Stats., 1985-86, which, it
argues, permits the Department to depart from standard methods of apportionment
where such methods would produce an unfair or inequitable result. We disagree.
Section
71.07(3), Stats., 1985-86,
provides in part:
Where, in the case
of any corporation, nonresident individual or nonresident estate or trust
engaged in business within and without the state of Wisconsin and required to
apportion its income as herein provided, it shall be shown to the satisfaction
of the department of revenue, that the use of any one of the 3 ratios above
provided for gives an unreasonable or inequitable final average ratio .... the
factors made use of in obtaining such ratio may, with the approval of the
department of revenue, be omitted in obtaining the final average ratio which is
to be applied to the remaining net income.
This
provision does not apply to UPSCO. By
its plain terms, it applies only to the apportionment formula that is applied
to corporations, nonresident individuals and nonresident estates and
trusts. That formula is set out in
§ 71.07(2)(a)-(cr), Stats.,
1985-86. The apportionment of financial
organizations and public utilities, such as UPSCO, is separately provided for
in § 71.07(2)(e), Stats.,
1985-86, and Wis. Adm. Code
§ Tax 2.46.
For
the same reason, § 71.07(5), Stats.,
1985-86, also does not apply. That
section provides an alternative method of apportionment, but only for corporations,
nonresident individuals and nonresident estates and trusts.
Wisconsin
Adm. Code § Tax 2.46
UPSCO asks this court to
interpret Wis. Adm. Code § Tax 2.46(1) as providing for a weighted
arrivals and departures factor.
However, the rule plainly provides that the factor consists of
"aircraft arrivals and departures."
There is no suggestion in the rule that the arrivals and departures
should be weighted. While a weighted
factor may be more accurate, it is up to the Department, not this court, to
change its rule.
By
the Court.—Order affirmed.
[1] Wisconsin
Adm. Code § Tax 2.46
provides in part:
The apportionable
income of an interstate air carrier doing business in Wisconsin shall be
apportioned to Wisconsin on the basis of the ratio obtained by taking the
arithmetical average of the following 3 ratios:
(1) The ratio which
the aircraft arrivals and departures within this state scheduled by such
carrier during the calendar or fiscal year bears to the total aircraft arrivals
and departures within and without this state scheduled by such carrier during
the same period.
(2) The ratio which
the revenue tons handled by such carrier at airports within this state during
the calendar or fiscal year bears to the total revenue tons handled at airports
within and without this state during the same period ...;
(3) The ratio which such air carrier's
originating revenue within this state for the calendar or fiscal year bears to
the total originating revenue within and without this state for the same
period.
[2] In contrast, the next largest aircraft used
by UPSCO during that time, a Boeing 727-100, has a maximum payload of 45,830
pounds. The largest aircraft used by
UPSCO has a maximum payload of 220,000 pounds.
[3] The Wisconsin statutes regarding income and
franchise taxes were repealed and recodified by 1987 Wis. Act 312, effective
January 1, 1989. The recodification
changed § 71.07(2)(e), Stats.,
to § 71.25(10)(c), Stats.
[4] Under each party's calculations, the revenue
tons factor for 1985 and 1986 was 1.93375 percent and 1.872719 percent,
respectively, and the originating revenue factor for 1985 and 1986 was 2.312998
percent and 2.062386 percent, respectively.
[5] A state tax will be consistent with the Due
Process Clause of the Fourteenth Amendment if:
(1) there is a minimal connection between the interstate activities to
be taxed and the taxing state, and (2) there is a rational relation between the
income attributed to the taxing state and the intrastate value of the
business. Allied-Signal, Inc. v.
Division of Taxation, 504 U.S. 768, 772, 119 L.Ed.2d 533, 542
(1992). However, because a state tax
that is consistent with the Commerce Clause is also consistent with the Due
Process Clause, we discuss only the Commerce Clause. Trinova Corp. v. Michigan Dep't of Treasury, 498
U.S. 358, 373 (1991); Consolidated Freightways Corp. v. DOR, 164
Wis.2d 764, 787, 477 N.W.2d 44, 53-54 (1991).