An installment contract for the purchase of a car requires payments of $319.55 at the end of each month for 3.5 years. Interest is 7% per annum compounded monthly (a) What is the amount financed? (b) How much is the interest cost? (al The amount finance is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (b) The interest is $0 (Round the final answer to the nearest cont as needed. Round all intermediate values to six decimal places as needed.)