Hilton Hotel needed200 compact refrigerators on a rush basis. It contacted Wholesale Refrigeration Co., a manufacturer of refrigerators. Wholesale said it would take some time to quote a price on an order of that size. Hilton responded by saying,"Send the refrigerators immediately and bill us later." The refrigerators were delivered three days later, and the invoice arrived four days after that. The invoice price was $140,000. Hilton believes that the wholesale market price of the refrigerators is only $120,000.Do the parties have a contract? If so, what is the price? Explain.