Laura is currently paying off her four-year car financing. when she purchased her car, it had a list price of $19,858. laura traded in her previous car, a good-condition 2000 honda insight, for 85% of the trade-in value listed below, financing the rest of the cost at 9.5% interest, compounded monthly. she also had to pay 9.27% sales tax, a $988 vehicle registration fee, and a $77 documentation fee. however, because laura wants to pay off her loan more quickly, she makes a total payment of $550 every month. how much extra is she paying monthly? round all dollar values to the nearest cent.