Alex is comparing two mortgage opportunities for his potential $120,000 mortgage. Mortgage A: 15 years at 5% with monthly payments of $948.95 and a total payback amount of $170,811 Mortgage B: 20 years at 5.5% with monthly payments of $825.46 and a total payback amount of $198,110.40 Now let's find the interest paid on each loan and compare. Total interest on mortgage A = $___

Total interest on mortgage B = $___

Mortgage ___ requires $ ___ more interest to be paid.