o RATIOS. PROPORTlONS, AND PERCENTS Computing the total cost and interest for a loan V ( The Longs bought a $233,000 townhome. They made a down payment of $45,000 and took out a mortgage for the rest. Over the course of 30 years they made monthly payments of $1127.16 on their mortgage until it was paid off. (a) What was the total amount they ended up paying for the townhome (including the down payment and monthly payments)? 3I] (b) How much interest did they pay on the mortgage? $D