The Browns want to purchase a house that costs $150,000. They plan to take out a $120,000 mortgage on the house and put $30,000 as a down payment. The bank informs them that with a 15-year mortgage their monthly payment would be $887.63 and with a  30-year mortgage their monthly payment would be $572.90. Determine the amount they would save on the cost of the house if they selected the 15-year mortgage rather than the 30-year mortgage.