On June30th Jin received an offer in the mail by a supplier to sell him a specific piece of equipment for $7,400. Jin sent a letter back to the supplier communicating his unconditional acceptance on July 3rd. The supplier received the letter on July 10th. Pursuant to these facts, when was the contract formed? Select one: O a. April 30th. O b. July 10th. O c. July 3rd. O d. You never had a contract