Peggy’s Prоduce cоntrаcted tо provide Gus Grocer with eight crаtes of lettuce аt Peggy’s Produce’s listed price. Peggy’s Produce’s shipping clerk mistakenly shipped only seven crates to Gus. Gus accepted delivery of the seven crates but immediately notified Peggy’s Produce that the delivery did not conform to the contract. Peggy’s Produce’s listed price for seven crates of lettuce was 7/8 of its listed price for eight crates. Peggy’s Produce shipped no more lettuce to Gus, and Gus has not yet paid for any of the lettuce.How much, if anything, is Peggy’s Produce entitled to collect from Gus?