Laura and Martin obtain a 30-year, 5160,000 conventional mortgage at 10.0% on a house selling for $200,000. Their monthly mortgage payment, including principal and interest, is $1392.00 a) Determine the total amount they will pay for their house. b) How much of the cost will be interest? a) The total amount that Laura and Martin will pay for their house is (Round to the nearest dollar as needed) b) They will pay a total of sin interest (Round to the nearest dollar as needed) Determine the simple interest. (The rate is an annual rate unless otherwise stated. Assume 360 days in one year) p= $700, r= 9.75%, t= 30 days The simple interest is $ (Round to the nearest cent as needed.)