Tirunesh takes out a thirty-year mortgage for $126,523 with the nominal interest rate convertible monthly set at 6.75%. The scheduled monthly payment amounts are level except for a slightly reduced final payment. After making payments on schedule for five years, Tirunesh decided to increase his monthly payments by $300 in order to pay off the mortgage more quickly. Assuming these increased payments are made, calculate the amount of interest Tirunesh pays during the seventh year.