Answer:
120 months or 10 years earlier
Explanation:
The computation of the number of years early would pay off the loan is shown below:
By using the financial calculator
RATE = 4% ÷ 12
P V = $50,000
PMT= -$203.24 - $302.99
FV = 0
CPT N=120
Now for extra payment it would take 120 months
And without extra payment it would take
= 20 × 12
= 240 months
So either 120 months or 10 years earlier