Principal Amount: 12000.0
Interest Rate: 7.5 %
Years: 3
Formula = P[r(1+r)^n/((1+r)^n)-1)]
Your monthly mortgage payment is 373.27 $ for 3 years and total amount 13437.72 $ to pay after interest with interest rate 7.5 % and total interest you will pay is 1437.72 $