Ellen has maxed out her credit card at $19,500 and vows not to make any other credit card purchases. Her credit card company charges 1.7\% interest per month, and the minimum monthly payment is all interest due plus 3% of the principal balance. How much of the balance can Elien pay down if she pays the minimum payment only for 5 months? Round the answer to the nearest cent. After 5 months, Elien would have paid off s