Carlos charges $8430 on his credit card to relocate for his first job. When he realizes that the interest rate for the unpaid balance was 27% compounded monthly, he decided not to charge anymore on that account. He wants to havethis account paid off by the end of three years, so he arranges to have automatic payments sent at the end of each month. What monthly payments must he make in order to pay off his credit card debt completely by the end of three years? How much total interest will he pay by the end of the three years?