I
Soft Drinks
USAir argues that passengers drank soft drinks to avoid dehydration during the flight and that its provision of such drinks was essential to rendering its transportation service. Thus, it argues, it used or consumed soft drinks directly in the rendition of a public utility service. The commissioner replies that USAir did not establish the necessity of the soft drinks in rendering the transportation service.
R.C. 5739.01(E)(2) excepts from the sales tax (and R.C. 5741.02[C][2] from the use tax) sales “in which the purpose of consumer * * * is to use or consume the thing transferred * * * directly in the rendition of a public utility service, except that the sales tax levied by section 5739.02 of the Revised Code shall be collected upon all meals, drinks, and food for human consumption sold upon Pullman and railroad coaches.”
R.C. 5739.01(P) defines “used directly in the rendition of a public utility service” as “that property which is to be incorporated into and will become a part of the consumer’s production, transmission, transportation, or distribution system *413and which retains its classification as tangible personal property after such incorporation; fuel or power used in the production, transmission, transportation, or distribution system; and tangible personal property used in the repair and maintenance of the production, transmission, transportation or distribution system, including only such motor vehicles as are specially designed and equipped for such use.”
Before the enactment of this definition on September 1, 1967 (then R.C. 5739.01[Q], 132 Ohio Laws, Part I, 1985), we exempted items that made the transportation service convenient and facilitative to passengers. Erie RR. Co. v. Peck (1953), 160 Ohio St. 322, 52 O.O. 209, 116 N.E.2d 304. However, after the General Assembly adopted this definition, the court, in Cincinnati Gas & Elec. Co. v. Kosydar (1974), 38 Ohio St.2d 71, 75, 67 O.O.2d 81, 84, 310 N.E.2d 245, 248, ruled that “the test for determining whether such acquisitions are within the public utility exception of R.C. 5739.01(E)(2) is a statutory one.” In paragraph one of the syllabus, the Cincinnati Gas court held that the property must satisfy one of the three standards of R.C. 5739.01(Q) (now [P]). In paragraph two of the syllabus, we held that the statute excepts “only those items * * * which are essential to the continuous production of the public utility service.”
In Cleveland Elec. Illum. Co. v. Lindley (1982), 69 Ohio St.2d 71, 74, 23 O.O.3d 118, 120, 430 N.E.2d 939, 941, we elaborated further:
“Under R.C. 5739.01(Q) [now (P) ] it is enough that the property, once acquired, actually is incorporated into and used as a part of a vital or essential step in the production process.”
In this case, however, we agree with the BTA. Soft drinks are a convenience for the passengers; soft drinks are not essential in transporting passengers. USAir’s witness, a senior pilot, could not testify that the soft drinks were essential to providing the transportation service. Indeed, USAir does not serve soft drinks on some flights because the flight is too short. Further, the witness could not cite a Federal Aviation Agency regulation requiring the serving of beverages. Thus, USAir did not establish that serving soft drinks to its passengers was essential or vital to transport passengers.
USAir also argues that we must interpret language in R.C. 5739.01(E)(2) that specifically taxes sales of food and beverages in Pullman and railroad coaches under the statutory-interpretation doctrine of expressio unius est exclusio alterius. It contends that this language must mean that the General Assembly intended not to tax soft drinks served in airplanes, since the statute specifically taxes sales of food in rail coaches.
The commissioner responds that this language conforms with R.C. 5739.02(B)(2), in that food consumed off a vendor’s premises is not taxable, but food sold for on-premises consumption is taxable. We agree. R.C. 5739.01(E)(2) *414recognizes that the premises in the railroad’s situation happens to be the Pullman car of a train. The General Assembly did not mention food sold on airlines because in 1937, when the General Assembly enacted this provision (then G.C. 5546-1), air travel was a nascent business. (116 Ohio Laws, Part II, 324.) The General Assembly probably did not contemplate serving food on airplanes.
II
Liquor
USAir next contends that its use of liquor is exempt under R.C. 5739.01(E)(1) and 5741.02(C)(2) because it purchased the liquor for resale. The commissioner first replies that USAir waived this claim because it failed to specify it as error in its petition for reassessment filed with the commissioner. USAir had mentioned the resale exemption in its notice of appeal filed with the BTA.
USAir filed the petition for reassessment after we decided CNG Dev. Co. v. Limbach (1992), 63 Ohio St.3d 28, 584 N.E.2d 1180. In CNG Dev. Co., issued on February 19, 1992, we required a taxpayer to specify error in its petition for reassessment to the commissioner, which permitted succeeding appellate bodies to have jurisdiction over the error. But, USAir filed the petition before the General Assembly enacted Am.S.B. No. 358, 144 Ohio Laws, Part II, 2370 (effective January 15, 1993), which permitted raising additional objections with the commissioner if registered in writing before the commissioner’s final determination. R.C. 5735.12(B). Consequently, USAir needed to specify this claim in its petition for reassessment. In its petition, filed on July 14, 1992, it states:
“Liquor.
“As explained to the auditor, all of USAir’s alcoholic beverages (liquor, beer, and wine) are purchased outside of Ohio. Alcoholic beverages are then distributed to the various stations. USAir only sells alcoholic beverages when its aircraft are in flight at a comfortable cruising altitude. Alcoholic beverage service is not made during ascent or descent and no sales are made on the ground. Therefore, the only time that the alcoholic beverages are sold to passengers is at cruise altitude, long after the aircraft has left or approaches any locality in the State of Ohio. Alcoholic beverage sales can be apportioned to the state. However, USAir aircraft are outside any Ohio county during any liquor sales. Therefore, there is no nexus in any Ohio county.
“USAir has already remitted a state sales tax on that portion of alcoholic beverages which is apportionable to the State of Ohio with its regular sales and use tax filings. In the assessment work papers on page[s] 30 to 35, the auditor has assessed local sales tax on alcoholic beverages used on a mysterious apportionment to each locality in Ohio. However, as previously mentioned, none of the *415sales of alcoholic beverages occur[s] within an Ohio county or city. This portion of the assessment should be deleted from the audit.”
USAir in its petition thus questions the commissioner’s action in assessing a permissive use tax on the liquor, and it alludes to the resale exemption in stating that it sold the liquor to passengers. Finally, USAir claims that the commissioner should not assess a permissive use tax on its use of the liquor. We find that these assertions specify error. “In resolving questions regarding the effectiveness of a notice of appeal, we áre not disposed to deny review by a hypertechnical reading of the notice. Abex Corp. v. Kosydar (1973), 35 Ohio St.2d 13, 17, 64 O.O.2d 8, 10, 298 N.E.2d 584, 587.” Buckeye Internatl, Inc. v. Limbach (1992), 64 Ohio St.3d 264, 268, 595 N.E.2d 347, 350. Since the BTA did not review this claim, we remand the case to it.
Since the BTA might not grant USAir relief on the resale claim, we must resolve USAir’s argument that the commissioner assessed tax on the wrong purchase price. According to the record, the commissioner derived the assessment by applying a factor to the collected and returned sales tax. USAir claims that the assessment, therefore, is on the presumably marked-up price it received from the passenger and not the price it paid for the liquor. The commissioner responds that this was the only evidence of a price he could locate.
USAir correctly claims that the price levied on should be what it paid for the liquor. R.C. 5741.02 levies the tax on the storage, use, or other consumption of tangible personal property. R.C. 5741.04 requires the consumer to pay the tax based on the price paid at or prior to the delivery of possession of the thing sold to the consumer, in this case, USAir. Thus, the commissioner should have assessed the tax on the price of USAir’s purchase of the liquor and not on the price of USAir’s sale to its passengers.
However, USAir must establish the price it paid. If it has not, as the commissioner maintains, it has failed in its burden of proof. Thus, the BTA must determine whether USAir has established the purchase price on the evidence of record. See Sunset Square Ltd. v. Miami Cty. Bd. of Revision (1990), 50 Ohio St.3d 42, 552 N.E.2d 632.
Accordingly, we affirm the assessment imposed on the soft drinks. We reverse and remand the assessment on the liquor transactions for the BTA to determine whether the resale exemption applies or, if not, to determine whether the purchase price of the liquor was established by USAir.
Decision affirmed in part, reversed in part and cause remanded.
Moyer, C.J., Douglas and Cook, JJ., concur. *416F.E. Sweeney, Pfeifer and Lundberg Stratton, JJ., dissent.