. The infinity trading corporation sells engine worth P4,000.00 cash. If paid for installment basis, a down payment of P1,000.00 is required and the balance interest compounded quarterly. If payment is to be made at the end of each quarter, find the amount of each payment. If after making a quarterly payment, the buyer decide to pay the balance in a lump sum at the end of the fifth quarter, What is the amount of this lump sum payment?