If Brian wants to buy a house that cost $ 100000 the bank agreed to give him 80 % of cost at 0.08 annual interest on a 10 - year loan , what is his monthly payment ? what is the monthly loan payment ? what is the interest paid in the first month ? what is the principal paid in the first month ? what is the interest paid in the second month ? what is the principal paid in the second month ? what is the total interest that was paid over the life of the loan ?