How to calculate the content of green grid? Thank you

15. If you can borrow $180,000 to buy a house using a 30-year mortgage at a 4.02 percent annual rate, what will be your monthly payment of principal and interest? How much will you pay in interest over 30 years? This problem is similar to Example 2 5-9 on page 165. 3 Mortgage loan $180,000 4 Annual interest rate on loan 4.02% 5 Monthly interest rate on loan 0.335% 5 Mortgage term in years 30 7 Mortgage term in months 360 Payment of principal and interest (PMT) Solution: $861.42 Total of payments Solution: $310,112.74 Interest paid over 30 years Solution: $130,112.74 How could the financing be changed so that you paid much less interest and made far fewer payments? Nm