please show formulas for how to solve

4. A homebuyer bought a house for $286,000. The buyer paid 25% down but decided to finance closing costs of 3% of the mortgage amount. If the borrower took out a 30 year fixed rate mortgage at a 6% annual interest rate, how much interest will the borrower pay over the life of the mortgage? A) $255,927 B) $248,473 C) $195,491 D) $266,992 E) $235,453