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 $1\mathrm{.}4$ percent per month interest on the overdue balance.

Required: If the current balance is $$17,340,$ how long will it take for the account to be paid off? $($Do not use rounded numbers in intermediate calculations. Round your answer to $2$ decimaal places.$)$