Solve the Problem Using the Rule of 78s

Multiple Choice

Solve the problem using the rule of 78s.
-A fisherman buys a new boat for $45,000. He makes a down payment of $17,000 and finances the Balance at 8% APR over 60 months. Before making the 45th payment, the fisherman decides to pay The remaining balance on the loan. How much interest will the fisherman save?

A) $359.78
B) $639.15
C) $397.69
D) $369.85