The shoes you want to buy are on sale for 25% off. The original price is $75. What is the sale price of the shoes?

a. $37,395.18

Step-by-step explanation:

First you have to calculate the payments for the loan at the 11% rate

where: loan=total amount; i= interest rate in decimal; n=number of periods

=$17253.69

then you calculate the payments at 5% loan (11%-6%=5%)

=$9757.72

then you substract que payments for the firts 10 years and get:

(10*17253.69) - (10*9757.72)=$74790.36

and finally you apply simple interest of 2.5% for 20 years to that amount and get:

$74760.36*0.025*20=$37,395.18