May be avoided or canceled by one of the parties Are valuable only if a dispute about the agreement occurs cannot be upheld by a court of law May be completely executory or partially complete Farmer Tom grows vegetables and sells most of them to grocery stores in his area. If one of the stores breaks a contract with him and fails to pay for a shipment, what body of law will primarily be used to determine the outcome of the case? state common law federal common law the Uniform Commercial Code [UCC) both a and b