Answer:
Step-by-step explanation:
For a payment of 3.72% per month, the amount after 20 years is:
(850 * 20*12) + (0.0372*8500*20*12)
= $211,588.8
This is the amount affordable
For a rate of 4.22%, we have:
If the rate rises from 3.72% to 4.22%, then
(850 * 20*12) + (0.0422*8500*20*12)
= $212,608.8
The amount by which the loan increases is:
$212,608.8 - $211,588.8 = $1020