Answer:
$174880
Step-by-step explanation:
1 year has 12 months, which means that 30 years is
30*12 = 360 months.
We are given in the task that the debt service is $708 per month. which means, for 30 years, the borrower will pay
360*708 = $254880
So, the total interest which will be paid by the borrower over the 30 - year term is
$254880 - $80000= $174880