In order to pay the $18,000 for the necessary repairs to the house, the couple has a choice between two options:
Borrow the $18,000 from the bank at 6% interest, compounded quarterly for 5 years.
Increase the mortgage amount to include the $18,000, bringing the total amount financed to $187,100
Compute the total interest paid over the life of the loan for each of these options.