2. Martina, a retailer, wrote and ordered 10 dozen red, white, and blue T-shirts for a July 4th celebration from Juan's Wholesale Shirt Company. Since Juan's did not have the red t-shirts available, it sent blue and white shirts, thinking that Martina could use them. Juan's did not notify Martina that the substitution had been made. Shipping the wrong goods a. is substantial performance by Juan. b. entitles Juan to quantum meruit . C. has no effect on the formation of a contract. d. constitutes an acceptance of Martina's offer and constitutes a breach of contract by Juan's. Under the UCC, the one term of a sale that must be in writing is the a. date of delivery. quantity of goods. C. unit price for goods. d. total sale price for goods