Use PMT = PLA -nt to determine the regular payment amount, rounded to the nearest dollar. The price of a small cabin is $40,000. The bank requires a 5% down payment. The buyer is offered two mortgage options: 20-year fixed at 6.5% or 30-year fixed at 6.5%. Calculate the amount of interest paid for each option. How much does the buyer save in interest with the 20-year option? Find the monthly payment for the 20-year option. S (Round to the nearest dollar as needed.). Find the monthly payment for the 30-year option. $ (Round to the nearest dollar as needed.) Calculate the total cost of interest for both mortgage options. How much does the buyer save in interest with the 20-year option? $ (Use the answers from parts 1 and 2 to find this answer.)