OPINION — AG — **** LEASE PURCHASE — INTEREST PAYABLE **** THE INTEREST PAYABLE UNDER A LEASE PURCHASE CONTRACT CAN BE PAID ONLY AT THE END OF THE LEASE PURCHASE CONTRACT AFTER THE GOVERNMENTAL UNIT INVOLVED HAS PAID ALL THE REQUIRED MONTHLY PAYMENTS. CITE: 62 O.S. 1970 Supp., 430.1 [62-430.1], 62 O.S. 1971 430.3 [62-430.3] (TODD MARKUM)