Answer:
$167,409.60 interest paid
Step-by-step explanation:
If $838.13 is paid each month for 25 years,
total paid = 848.13 x 12 x 25 = $254,439
Therefore, 254,439 - 120,000 = $134,439 interest paid
If $798.36 is paid each month for 30 years,
total paid = 798.36 x 12 x 30 = $287,409.60
Therefore, 287409.6 - 120,000 = $167,409.60 interest paid