According to UCC Article 2. If the payment terms are not specified in a sales contract, payment is due at the ?????? buyer's place of business upon formation of the contract, and must be made by check time and pilace where the seller is to make dellien, noc mos be mode the exp seliers place of business upon formation of the contract, and may be made in any commerclatly reasonable for time and place where the setter is to make delivery, and may be made in any commercially reasonable form