John and Mary would like to buy a house to settle down. The mortgage loan is $250,000. According to the Wall Street Journal, the 30-year mortgage rate is 3.12%, and the 15-year mortgage rate is 2.58%. John and Mary would like to find out the difference in total interest payments between the 30-year and 15-year mortgage loans. Using the monthly mortgage formula, select the closest number. Select one: a. 83566 b. 83576 c. 83606 O d. 83556 e. 83586 f. 83596