Aretailer entered into a written contract with a wholesaler whereby the wholesaler agreed to sell, and the retailer agreed to buy, 100 boxes of sunglasses manufactured by a large corporation located in a neighboring city. the agreed-upon price was $75 per box. two weeks before the specified delivery date, the wholesaler told the retailer that it would not be able to fill its order, because of unexpected high demand for sunglasses this season. although the retailer learned that the needed quantity of the same brand of sunglasses could be shipped within two days for $83 per box from a supplier in another area, the retailer instead purchased 100 boxes of the sunglasses locally at a cost of $90 per box. these sunglasses were of a slightly higher quality than the sunglasses that were originally contracted for. a few days before the original delivery date, the wholesaler notified the retailer that it would fill the order, and tendered 100 boxes of the sunglasses on the date of delivery. however, the retailer refused to accept them. at that time, the wholesale market price of the sunglasses had declined to $80 per box. if the retailer sues the wholesaler for damages based on the wholesaler's alleged breach, what is the retailer likely to recover? a $1,500, the difference between the cost of cover and the contract price. b $800, the difference between the contract price and the nonlocal supplier's price. c $500, representing the difference between the contract price and the wholesale market price at the time of performance. d nothing, because the retailer obtained cover without waiting a commercially reasonable time for the wholesaler to retract the repudiation.