annual rate on this loan?$21.$ Calculating Number of Periods One of your customers is delinquent on his accounts payable balance. You've mutually agreed to a repayment schedule of $$400$ per month. You will charge $1\mathrm{.}4$ percent per month interest on the overdue balance. If the current balance is $$17,320,$ how long will it take for the account to be paid off?$22.$ Calculating EAR Friendly's Quick Loans,