(Nonannual compounding using a calculator) Dennis Rodman has a $4,000 debt balance on his Visa card that charges an APR of 13.1 percent compounded monthly. Dennis's current minimum monthly payment is percent of his debt balance, $200. How many months (round up) will it take Dennis to pay off his credit card if he pays the current miminum payment of $200 at the end of each month? How many months will it take Dennis to pay off his credit card?

(Round up to the nearest unit.)