the inventor of a laser beam vegetable chopper ran a television ad saying this chopper is yours for only $49.99if you send your check or money order to a specified post office box. A customer wrote the inventor and asked what is your best, firm price for 2 dozen choppers. The inventor wrote back we quote you for prompt acceptance $39.99 per unit. Two month later the customer mailed a check to the inventor in the appropriate amount, along with a memo saying I accept your offer for 24 choppers. Is there an enforceable contract. My answer is no because the customer waited 2 months to reply to the inventor quote of prompt acceptance.