A recent college graduate buys a new car by borrowing $20,000 at 7.2%, compounded monthly, for 4 years. She decides to pay $501 instead of the monthly payment required by the loan.

(a) What is the monthly payment required by the loan? (Round your answer to the nearest cent.) $ 480.78 How much extra did she pay per month? (Round your answer to the nearest cent.) $ (b) How many $501 payments will she make to pay off the loan? (Round your answer up to the next whole number.) 47 payments (c) How much will she save by paying $501 per month rather than the required payment? (Round your answer to the nearest cent.) $