One of your customers is delinquent on his accounts payable balance. You've mutually agreed to a repayment schedule of $500 per month. You will charge 1.5 percent per month interest on the overdue balance. If the current balance is $18,000, how long will it take for the account to be paid off? PV: $18,000 Int rate/month: 1.5% Repayment per month: $500