After visiting several automobile dealerships, Richard selects the used car he wants. He likes its $15,300 price, but financing through the dealer is no bargain. He has $3,000 cash for a down payment, so he needs an $12,300 loan. In shopping at several banks for an installment loan, he learns that interest on most automobile loans is quoted at add-on rates. That is, during the life of the loan, interest is paid on the full amount borrowed even though a portion of the principal has been paid back. Richard borrows $12,300 for a period of four years at an add-on interest rate of 10 percent. a. What is the total interest on Richard's loan? Note: Do not round intermediate calculations. Round your answer to the nearest whole number. b. What is the total cost of the car? Note: Do not round intermediate calculations. Round your answer to the nearest whole number. c. What is the monthly poyment? Note: Do not round intermediate calculations. Round your answer to the nearest whole number. d. What is the annual percentage rate (APR)? Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places