A couple took out a 30-year mortgage 10 years ago. At that time,
the mortgage was $306,800.00, with 7.44% APR and monthly
compounding of interest. Today, the couple has been offered
$327,700.00 for their house. If the couple accepts the offer, how
much cash will they take from the deal? The cash will be the
difference between the sell price and what is owed on the loan.