Answer:
a) loan A is a better choice
b) loan B is a better choice
Explanation:
the monthly payment of loan A = $449.66
present value of loan A = ($75,000 x 6%) + $75,000 = $79,500
the monthly payment of loan B = $498.98
present value of loan B = ($75,000 x 2%) + $75,000 = $76,500
the difference between monthly payments = $498.98 - $449.66 = $49.32
if we calculate the present value of 20 years paying $49.32 more it is:
PV = $49.32 x 139.58077 (PV annuity factor, 0.5%, 240 periods) = $6,884 which is higher than the difference
if we calculate the present value of 5 years paying $49.32 more it is:
PV = $49.32 x 51.72556 (PV annuity factor, 0.5%, 60 periods) = $2,551 which is lower than the difference