This case involves a claim by numerous farmers against the United States for common law conversion pursuant to the Federal Tort Claims Act, 28 U.S.C. § 2674 (1982). The main issue presented on appeal is whether the district court abused its discretion in calculating the damages due the farmers. We find no abuse of discretion, and accordingly affirm the district court’s judgment.
I.
The plaintiffs Robert L. Preston and others are farmers (and the estates of deceased farmers) who deposited grain subject to either warehouse receipts or “price later contracts” in a grain warehouse operated by Grain Finance Company (“Grain Finance”) and by Farmers Grain Exchange, Inc. (“FGX”) in Evansville, Wisconsin. In addition to storing grain subject to warehouse receipts and price later contracts, the warehouse was an authorized depository for grain owned by or pledged to the Com- *756 modify Credit Corporation (“CCC”) of the United States Department of Agriculture. 1
On November 13, 1972, following a periodic audit, the CCC discovered that there was a substantial shortage of grain at Grain Finance. The CCC issued two loading orders for the grain on November 21 and 22, 1972, directing that all of the grain in storage at the warehouse be delivered to the CCC. The CCC received a total of 293,466.12 bushels of grain pursuant to these loading orders. This amount exceeded the pro rata share to which the CCC was entitled in November 1972. Following this delivery, the storage facilities filed for bankruptcy.
In 1977, the plaintiffs filed an action against the United States for misrepresentation and conversion under the Federal Tort Claims Act. The district court dismissed the plaintiffs’ complaint on the ground that the claims of misrepresentation or deceit were barred by the exception for such claims in the Federal Tort Claims Act, 28 U.S.C. § 2680(h) (1982). The district court did not discuss the CCC’s alleged conversion in its opinion. This court affirmed the district court’s decision as to misrepresentation, but reversed and remanded for the lower court to address the conversion claim.
Preston v. United States,
The plaintiffs filed an amended complaint in the district court, and at the conclusion of the plaintiffs’ evidence, the court directed a verdict for the United States. The district court held that the plaintiffs’ action was barred by the discretionary function exception to the Federal Tort Claims Act, 28 U.S.C. § 2680(a) (1982), and that the plaintiffs had not stated a claim for conversion. On appeal to this court, we held that the plaintiffs had stated a claim for conversion that was not barred by the discretionary function exception.
Preston v. United States,
On remand, the United States agreed not to contest liability. On the issue of damages, the plaintiffs presented evidence that the United States had converted 186,479.14 bushels of grain in excess of its pro rata share according to this court’s guidelines based on figures as of the close of business on November 20, 1972. The plaintiffs sought as damages the value of the converted grain and an amount to cover the plaintiffs for their loss of the use of the converted grain. Using figures as of the close of business on November 30, 1972, *757 the United States conceded that it had received 131,153 bushels of grain in excess of its pro rata share, but claimed that this amount would result in a windfall to the plaintiffs. The United States thus argued that the plaintiffs should only receive the amount of damages representing their proportionate share of the grain that was held by all depositors, or 69,797.15 bushels. In an opinion issued on February 10, 1984, the district court established its own damages formula and concluded that the United States had converted only 22,380.72 bushels in excess of its pro rata share. The court valued each bushel at $3.56 and entered judgment against the United States in the amount of $79,675.36.
On appeal, the plaintiffs claim that the district court abused its discretion in calculating damages by failing to follow this court’s guidelines as to how damages should be computed. The plaintiffs also claim that they are entitled to recover as additional compensatory damages the value of the loss of use of the converted grain for the years that the United States has had the use of that grain.
II.
In
Preston II,
this court held that the plaintiffs had demonstrated that the CCC had wrongfully taken property owned by the plaintiffs and that an action in conversion was appropriate.
In denying the petition for rehearing in
Preston II,
we noted that we could not compute with precision the actual monetary damages that the plaintiffs should receive under the above guidelines and that the district court would thus have discretion to deviate from these guidelines if their application would result in an inequity.
Preston v. United States,
In the present case, the district court devised a formula for measuring the amount of grain that the CCC converted in excess of its pro rata share as of November 30, 1972. The district court took the number of bushels of grain that the CCC had deposited at the warehouse (293,466.12) and divided that figure by the total number of bushels of grain that should have been stored at the warehouse by the plaintiff farmers, the nonplaintiff farmers, and the CCC (69,797.50 + 111,337.86 + 293,466.12 = 474,601.48). The result represents the CCC’s percentage share of the total number of bushels of grain at the warehouse. The district court then multiplied this percentage figure by the number of bushels of grain that were actually in storage in November 1972 when the warehouse was experiencing financial difficulties (438,406.-84), in order to determine the CCC’s pro rata share of the grain that was present in the warehouse before the CCC issued its loading orders. If the variable “y” represents the CCC’s pro rata share, then the formula would be as follows:
*758
Using this formula, the plaintiffs and the nonplaintiff farmers, owning 69,797.50 and 111,337.86 bushels of grain, respectively, would be entitled to the following pro rata share of the total number of bushels in storage as of November 1972:
The plaintiffs argue that the district court abused its discretion by failing to include the price later obligations in the total warehouse grain obligations when computing the CCC’s pro rata share of the grain. In
Preston II,
we indicated that for purposes of determining the CCC’s pro rata share, the price later obligations had to be included in the total warehouse grain obligations to compute the extent of the shortage because the warehouse had obtained title to the grain from the farmers at the time that it entered into the price later contracts, and thus had become a co-tenant in the common mass of warehouse grain along with the CCC, the plaintiff farmers, and the nonplaintiff farmers, to the extent of the warehouse’s interest.
As explained earlier, price later obligations arose when the warehouse purchased grain deposited by a farmer and agreed to pay the market price for this grain at a future date. We held in
Preston II
that the plaintiffs were collaterally es-topped from litigating the issue of whether title to grain that was subject to a price later contract passed to the warehouse or remained with the farmer since a bankruptcy judge in the proceedings involving Grain Finance and FGX had already concluded that title to the grain passed to the warehouse at the time that the price later contract was executed.
Although the warehouse obtained title to the grain through the price later contracts, it does not necessarily follow that these contracts should be included in the total warehouse grain obligations (represented in the denominator of the fraction in the formula). The grain owned by the warehouse pursuant to the price later contracts should only be included in the total warehouse grain obligations if the warehouse was entitled to a pro rata share. We hold that the warehouse did become a co-tenant in the common mass of grain to the extent of its interest represented by the price later contracts, but that the district court did not abuse its discretion in holding that these contracts should not be included in the formula to determine the CCC’s pro rata share since the warehouse was not entitled to share in the total remaining
*759
amount of bushels in storage in November 1972. Although there are no eases decided under Wisconsin law, other courts clearly have held that a warehouse, which commingles its fungible goods with those of other depositors, is only entitled to share pro rata in the goods remaining following a loss for which the warehouse is not responsible.
See Preston II,
In the present case, the disparity between the grain on hand and the grain needed to meet the warehouse’s obligations was due to Grain Finance and FGX’s practice of distorting the audits of their books by using the same grain both to represent purchases and obligations of the legally separate, but physically integrated firms.
Preston I,
In addition to arguing that the price later contracts should have been included in computing the CCC’s pro rata share, the plaintiffs argue that the district court should have selected November 20, 1972, rather than November 30, 1972, as the date on which the CCC’s pro rata share should have been computed. On November 30, the CCC issued its second loading order covering 91,517 of the total 293,466.12 bushels of grain pledged to the CCC to secure loans to farmers. As a result of this order, the CCC claimed entitlement to this additional amount of grain as of November 30, while the CCC would not have been entitled to such grain on November 21 when the first loading order was issued.
In
Preston II,
we held that the CCC’s pro rata share should be determined as of November 21, 1972, when the CCC issued its first loading order.
Using the formulas outlined above, we hold that the district court correctly
*760
determined that the CCC was entitled to 271.085.40 bushels of grain from the total number of bushels in storage in November 1972. Since the CCC’s pro rata share was 271.085.40 bushels, and since it actually-received 293,466.12 bushels pursuant to its loading orders, the CCC converted 22,380.-72 bushels of grain and must disgorge the value of that amount, or $79,675.36 (at the $3.56 price per bushel used by the district court). Pursuant to this court’s decision accompanying the denial of the petition for rehearing in
Preston II,
the district court ordered the CCC to disgorge the value of all of the grain that the CCC had converted, or $79,675.36, to the plaintiff farmers rather than limiting the plaintiffs’ recovery to the fraction representing their proportionate representation of all of the depositors at the warehouse.
See Preston v. United States,
The plaintiffs’ final argument is that they are entitled to recover as additional compensatory damages the value of the loss of use of the converted grain during the twelve years that the CCC has had the use of that grain. While acknowledging that the Federal Tort Claims Act, 28 U.S.C. § 2674 (1982), bars an award of prejudgment interest, the plaintiffs seek to distinguish an award of interest from compensation for the loss of use of the converted items. The district court rejected this argument because it found that the plaintiffs were really seeking an award of interest.
We affirm the district court’s decision denying compensation to the plaintiffs for the loss of the use of their grain for twelve years. In reality, the plaintiffs are seeking an award of prejudgment interest since they would have sold the grain if the CCC had not converted it and since they would have been able to obtain interest on the proceeds from this sale. Compensation for the use of money damages prior to judgment would clearly be an award of prejudgment interest, which is barred by the Federal Tort Claims Act.
See Southern Pacific Transportation Co. v. United States,
In conclusion, we affirm the district court’s decision awarding the plaintiffs $79,675.36 in damages for the 22,380.72 bushels of grain converted by the CCC from November 1972 to October 1974.
Notes
. The two companies stored grain for Evansville area farmers in the warehouse and issued warehouse receipts for the grain in the names of Grain Finance and FGX.
Preston v. United States,
The farmers also deposited grain at the warehouse under such other arrangements as simple bailments and price later contracts, which did not involve loans by the CCC to the farmers. Id. at 235. Under a price later contract, Grain Finance and FGX would purchase some of the grain deposited by the farmers subject to agreements to pay the market price for the grain at a future date. Id. at 235 n. 3.
. The plaintiffs really had only 69,797.50 bushels of grain in storage at the warehouse, while the other nonplaintiff farmers had 111,337.86 bushels of grain at the warehouse. Thus, one could argue that the plaintiffs were really only entitled to 69,797.50/181,135.36 or 38.53% of the 22,380.72 bushels of grain converted by the CCC.
