You purchased a home 15 years ago by borrowing $500,000 under a 30 year mortgage at an interest rate of 5%. You are now able to lower your interest rate by refinancing into a 15 -year mortgage at an interest rate of 4%. Which of the following is the closest to the amount of interest you will save through refinancing (assuming you will stay with the refinance loan for the entire 15 yeards? $466,278$322,558$143,719$31,224