A homeowner could take out a 15-year mortgage at a 5.5% annual rate on a $195,000 mortgage amount, or she could finance the purchase with a 30-year mortgage at a 6.1% annual rate. How much total interest over the entire mortgage period could she save by financing her home with the 15-year mortgage (to the nearest dollar)? A. $230,408 B. $190,105 C. $155,612 D. $144,325 E. $138,612

show me how to do it in the financial calculator please