The price of a home is $270,000. The bank requires a 5% down payment. The home is financed with a 20-year mortgage at 7%. Payment = Find n - nxt 1-1+ 11 a) down payment. b) amount of mortgage. c) monthly payment. d) total cost of interest over 20 years. (Round answers to the nearest cent.) a) down payment: $13,500 b) amount of mortgage: $256,500 c) monthly payment: $$1988.64 d) total cost of interest over 20 years: $477273.60 a) down payment: $13,500 b) amount of mortgage $256,500 c) monthly payment: $624.04 d) total cost of interest over 20 years: $477273.60 a) down payment: $13,500