Martin & Stеwart, Ltd., appeals from a judgment in favor of Lackawanna Leather Company resulting from damaged cattle hides purchased by Lackawanna from Martin & Stewart. Martin & Stewart allege that the verdict was not supported by sufficient evidence and that the trial court erroneously instructed the jury. Lackawanna cross-appeals from the district court’s order denying it prejudgment interest. We аffirm the judgment of the district court. 1
Lackawanna, a manufacturer of upholstery leather, purchased two truckloads of cattle hides from Great Plains Processing, a hide supplier partly owned by Martin & Stewart. The first truckload, containing 973 hides, was delivered on August 1, 1979, and was stored in the Lackawanna plant. The second, containing 930 hides, was delivered on August 9 and was stored in a separate tin warehouse. Upon delivery, a small number of the hides were visually inspected by Lackawanna employees for excessive water, dirtiness, foul odor or “anything crawling.” No such damage was discovered. Lackawanna paid Martin & Stewart $95,212.31 for the hides plus freight charges.
Lackawanna began processing the hides on September 26. Four hundred hides from the August 1 shipment first had the salt and hair chemically removed. They were then sorted and split. This splitting process revealed the hide damage. Of the one hundred forty-four hides that were split, ninety-four were found to have grain damage. Subsequent inspection revealed that about two-thirds of the entire August 1 shipment was found to have similar damage. Lackawanna and Martin & Stewart personnel initially concluded that the damage was due to excessive water in the hides, and the second truckload was returned to Great Plains on October 2 to be rebrined. On October 9, two shipments of hides received by Lackawanna from Iowa Beef Processors (IBP) were rejected because hide beetles were discovered. Shortly after the IBP delivery, beetles were discovered for the first time in Lackawanna’s tin warehouse. At the same time, Lackаwanna received a laboratory report stating that the hide damage resulted not from water but from beetles. On October 16, *1200 one hundred thirty-five of the rebrined hides were returned to Lackawanna from Great Plains. Upon removal of the hair, the same type and extent of damage previously detected was discovered. On October 24, Lackawanna formally notified Martin & Stewаrt that the hides were defective due to hide beetle damage. The damaged hides were ultimately resold to Martin & Stewart for $20,000.00.
Lackawanna brought this action against Martin & Stewart in January, 1980. The chief issue at trial was whether the hide damage existed at the time of delivery or occurred while the hides were stored at the Lackawanna facility. The case was tried to a jury on the alternative theories of revocation of acceptance and breach of warranties. After the jury returned a verdict in favor of Lackawanna, the district court denied Martin & Stewart’s motion for a judgment notwithstanding the verdict or, in the alternative, for a new trial.
I.
Martin & Stewart first argue that the verdict was not supported by legally sufficient evidence of revocation of acceptance or breach of warranties. It claims that Lackawanna produced no direct evidence of beetle infestation at the time the hides were delivered, and therefore relied exclusively on circumstantial evidence to infer the existence of predelivery damage. Martin & Stewart assert that when circumstantial evidence forms the sole basis for the verdict, Nebraska law requires that the circumstances be such that the conclusion reached by the jury is the only one that can fairly and reasonably be drawn. As it believes that the inference of post-delivery damage to be equally plausible, Martin & Stewart argue that the evidence was insufficient to support the verdict.
Martin & Stewart characterize the verdict as one based on circumstantial evidence. It argues that the evidence directly proved a number of facts, but still required the jury to infer the ultimate issue — whether the hides were damaged before receipt. However, expert witnesses testified that the hides were damaged before receipt. This was opinion evidence on the ultimate issue, and the test for circumstantial evidence was therefore inapplicable.
Freemont Farmers Union Coop. Ass’n v. City of Freemont,
An appeal from a motion for judgment notwithstanding the verdict is reviewed under the same standard as a directed verdict.
Compton v. United States,
(1) resolve direct factual conflicts in favor of the nonmovant, (2) assume as true all facts supporting the nonmovant which the evidence tended to prove, (3) give the nonmovant the benefit of all reasonable inferences, and (4) deny the motion if the evidence so viewed would allow reasonable jurors to differ as to the сonclusions that could be drawn.
Dace v. ACF Industries, Inc.,
Applying the above standard, we cannot say that the verdict in favor of Lackawanna was unsupported by sufficient evidence. The evidence showed that of fifty thousand hides stored at Lackawanna, only Martin & Stewart hides were damaged in this manner. Although beetles were found in the tin warehouse which housеd the August 9 shipment of hides before they were returned for rebrining, other hides stored there for longer periods did not suffer any damage. Experts testified that the hide damage was such that live beetles, discarded larvae skins and fecal matter should have been evident upon visual inspection. None were discovered. Experts also testified that the eating pattern indicated that the dаmage occurred while the hides were folded hair in, although they were delivered to Lackawanna and remained folded hair out. In light of this evidence, we cannot conclude that, as a matter of law, the damage occurred after delivery, and therefore the district court did not err in denying the motion for directed verdict.
II.
Martin & Stewart next allege three errors arising from the trial сourt’s instructions to the jury concerning the elements of revocation of acceptance and breach of warranty. While state law determines the substance of jury instructions in a diversity action, the granting or denying of such instructions is controlled by federal law.
Hrzenak v. White-Westinghouse Appliance Co.,
Parties are entitled to have their theory of the ease presented to the jury if “legally correct, supported by the evidence and brought to the court’s attention in a timely request.”
Board of Water Works Trustees of Des Moines v. Alvord, Burdick & Howson, Inc.,
A.
Under the Nebraska Commercial Code, “[rjevocation of acceptance must occur within a reasonable time after the buyеr discovers or should have discovered the ground for it____” Neb.Rev.Stat. ch. 91 § 2-608(2) (Reissue 1980). The two truckloads of hides were delivered to Lackawanna on August 1 and August 9. Acceptance was not revoked until October 24. In support of its assertion that Lackawanna did not revoke “within a reasonable time,” Martin & Stewart introduced in evidence a booklet entitled Trade Practice for Proper Cattle Hide Delivery. The booklet, issued by hide buyers, states that inspection prac *1202 tices should include “[a] random sample inspection [of the hides] ... within five days after the unloading of the carrier.” Based on this evidence of trade practice, Martin & Stewart requested an instruction that trade practice may be considered “in determining whether the actions claimed by Lackawanna were timely or proper.” The trial judge declined to adopt this instruction, and instead charged thе jury that “[t]he law recognizes and approves the use of trade custom and practice [in the buying, selling and storage of hides] in commercial transactions such as are involved in this case.” Martin & Stewart allege that the failure to adopt its proffered instruction was prejudicial error.
We cannot agree that the district judge’s action was an abuse of discretion. The cоurt’s instruction in general terms informed the jury that the law recognized approved trade customs and we believe that this sufficiently directed the jury’s attention to this issue without the more specific reference requested by Martin & Stewart. We cannot conclude that the instruction as given did not fairly and adequately reflect the applicable law, and we find no error in the jury’s charge.
B.
Section 2-608(2) also requires that “[Revocation of acceptance must occur ... before any substantial change in condition of the goods which is not caused by their own defects.” Martin & Stewart claim that the only evidence presented showed without contradiction that Lackawanna removed the salt and hair from most of the first truckload of hides and split some of them. Therefore, Martin & Stewart asserts that the hides had been “substantially changed” as a matter of law and that no instruction concerning revocation of acceptance should have been given to the jury.
The “substantial change in condition” requirement insures that post-acceptance revocation, a more extraordinary remedy as the seller may have long since cоnsidered the transaction closed, is not abused by forcing sellers to take back used or mistreated goods. J. White & R. Summers,
Uniform Commercial Code
254-55 (1972). Nebraska has long endorsed the protection of seller’s rights in analogous cases of equitable rescission,
Caruso v. Moy,
A number of factors lead us to the conclusion that the district judge was justified in submitting Lackawanna’s revocation of acceptance theory to the jury. First, evidence was offered which showed that only by processing the hides could the beetle damage be discovered. This supports Lackawanna’s assertion that any change in the condition of the hides resulted from their own defects which, according to the language of and comments to section 2-608(2), does not constitute a substantial change in condition.
4
Secondly, Martin & Stewart sold the hides knowing that the processing was necessary to make the hides commercially usаble to Lackawanna. Third, once Lackawanna discovered the damage, it rebrined the hides in an attempt to salvage the remainder. Finally, testimony was presented to show that Lackawanna’s processing enhanced rather than impaired the value of the hides. Given these factors, our conclusion that this was a jury
*1203
question draws support from decisions holding that no substantial change in condition occurs when the buyer attempts to conform the goods to their bargained-for condition.
See, e.g., American Research Bureau v. E-Systems, Inc.,
C.
Martin & Stewart also objects to the jury instruction on damages for breach of warranty. Under section 2-714(1), damages determined “in any manner which is reasonable” are recoverable for breach of warranty. The typical measure used is the difference in market price between the goods as warranted and the goods as received, measured at the time and place of acceptance. Neb.Rev.Stat. ch. 91 § 2-714(2) (Reissue 1980);
Alliance Tractor & Implement Co. v. Lukens Tool & Die Co.,
We must reject Martin & Stewart’s contention. Section 2-714 clearly provides that a buyer’s damages for a seller’s breach of warranties may be determined “in any manner which is reasonable.” This reflects the Uniform Commercial Code’s mandate that “remedies provided by this act shall be liberally administered,” Neb. Rev.Stat. ch. 91 § 1-106 (Reissue 1980), and that they need not be calculated with “mathematical certainty,” id. at comment 1. Lackawanna presented evidence that the hides were valueless for its purposes and that it resold them for $20,000.00. The jury awarded Lackawanna the purchase price of the hides plus freight adjusted for the resale price and the value of the hides it retained. The evidence supports this determination and we cannot say it was unreasonable within the meaning of section 2-714.
III.
The final point is Lackawanna’s cross-appeal from the district court’s denial of prejudgment interest. Lackawanna contends that it is entitled to prejudgment interest *1204 from September 1, 1979 under Neb.Rev. Stat. § 45-104 (Reissue 1978).
It is well established under Nebraska law that prejudgment interest is recoverable only when the claim is liquidated. A claim is liquidated if
the evidence furnishes data which, if believed, makes it possible to compute the amount without reliance upon opinion or discretion. Examples are claims upon promises to pay a fixed sum, claims for money had and received, claims for money paid out, and claims for goods or services to be paid for at an agreed rate.
Abbott v. Abbott,
We affirm the district court’s determination based on a recent decision rejecting prejudgment interest on substantially similar facts. In
Nebraska Public Power Dist. v. Borg-Warner Corp.,
The judgment of the district court is affirmed.
Notes
. The Honorable C. Arlen Beam, United States District Judge for the District of Nebraska.
. The test for the sufficiency of circumstantial evidence is the same under federal and Nebraska law.
Wray M. Scott Co. v. Daigle,
. Some Nebraska cases, while in agreement with the federal standard concerning how the evidence should be viewed, employ somewhat different language and state that after the evidence is so viewed, the jury’s verdict must be upheld unless "clearly wrong."
Lockhart v. Continental Cheese,
. Comment 6 to section 2-608(2) provides as follows:
6. Under subsection (2) the prior policy is continued of seeking substantial justice in regard to the condition of goods restored to the seller. Thus the buyer mаy not revoke his acceptance if the goods have materially deteriorated except by reason of their own defects. Worthless goods, however, need not be offered back and minor defects in the articles reoffered are to be disregarded, (emphasis added).
. Section 2-608(1) also requires that revocation be by "lot or commercial unit whose nonсonformity substantially impairs its value to him____” Martin & Stewart argue that the truckload was the proper commercial unit and that its value was not substantially impaired because only two-thirds of the hides were damaged and a ready market existed for them and for the remaining one-third. The claim must be rejected. The jury was properly permitted to determine the commercial unit, and damage tо two-thirds of the truckload qualifies as substantial.
Cf. Countryside Mobile Homes v. Schade,
