4a. You want to buy a new house, but you are not sure what you can afford. What is the monthly payment for a 30 year loan with a 5.5% APR if the loan is for $290,000? 4b. You want to know if you can afford a more expensive house. What is the monthly payment for a 30 year loan with a 5.5% APR if the loan is for $320,000?