Vegeta and Bulma are looking to settle down and have decided to purchase a new home on Namek. they have found a house that will cost them 345,000 and they plan to make a 45000 down payment. the remainder will be financed with a 4.0% fixed rate 15- year mortgage.

Part 1. How much will their monthly payment be?

Part 2. How much of the first payment will be interest?