Rich is going to a 4-year college. He was given a 10-year, unsubsidized student loan for $7,900 at 4.29%. He has to option of beginning to repay the loan in 4.5 years. He also knows that during the time he is not making payments, interest will be charged at 4.29%. Suppose Rich only paid the interest during his 4 years in school and the 6-month grace period. What will his monthly payments be? Round to the nearest cent.