Answer:
The answer is $76,312.05
Explanation:
We have monthly interest rate which is discount rate is: 5% / 12 = 0.42%;
The mortgage will have 25 x 12 = 300 payments;
The monthly payment is calculated by applying present value for annuity as below:
(150,000 x 0.42%) / [ 1 - (1+0.42%)^(-300)] = $880.38
As at the time of fully pay-off, there are (25-16) * 12 = 108 payments left.
The amount needs to fully pay-off this loan is equal to the present value of 108 payments left which is calculated as below:
(880.38/0.42%) * ( [ 1 - (1+0.42%)^(-108)] = $76,312.05.
So, the answer is $76,312.05.