Find the amount of interest in the 50th payment.

5. A $8,000 loan is being repaid by payments of $100 each at the end of each month for as long as necessary, plus a smaller final payment. If the nominal rate of interest convertible monthly is 12%, find the amount of interest in the 50th payment. A) $66.30 B) $66.78 C) $67.10 D) 867.43 E) 967.76