The Turners have purchased a house for $180,000. They made an initial down payment of $30,000 and secured a mortgage with interest charged at the rate of 2.5%/year on the unpaid balance. (Interest computations are made at the end of each month.) Assume that the loan is amortized over 30 years. (Round your answers to the nearest cent.) (b) What will be their total interest payment? $ (c) What will be their equity (disregard depreciation) after 10 years