Robert in Chicago entered into a contract to sell certain machines to Terry in New York. The machines were to be manufactured by Robert and shipped F.O.B. Chicago not later than March 25. On March 24, when Robert was about to ship the machines, he received a letter from Terry wrongfully repudiating the contract. The machines cannot readily be resold for a reasonable price because they are a special kind used only in Terry's manufacturing processes. Robert sues Terry to recover the agreed price of the machines. What are the rights of the parties?