Charles is going to purchase a new car that has a list price of $21,450. He is planning on trading in his good-condition 2004 Dodge Neon and financing the rest of the cost over three years, paying monthly. His finance plan has an interest rate of 12.28%, compounded monthly. Charles will also be responsible for 6.88% sales tax, a $1,089 vehicle registration fee, and a $124 documentation fee. If the dealer gives Charles 80% of the listed trade-in price on his car, once the financing is paid off, what percent of the total amount paid will the interest be? (Consider the trade-in to be a reduction in the amount paid.) Dodge Cars in Good ConditionModel/Year20042005200620072008Viper$7,068$7,225$7,626$7,901$8,116Neon$6,591$6,777$6,822$7,191$7,440Intrepid$8,285$8,579$8,699$9,030$9,121Dakota$7,578$7,763$7,945$8,313$8,581a.17.64%b.15.67%c.16.70%d.12.86%