Chapter 4, Problem 1PP

Write a program that computes the annual after-tax cost of a new house for the first year of ownership. The cost is computed as the annual mortgage cost minus the tax savings. The input should be the price of the house and the down payment. The annual mortgage cost can be estimated as 3 percent of the initial loan balance credited toward paying off the loan principal plus 6 percent of the initial loan balance in interest. The initial loan balance is the price minus the down payment. Assume a 35 percent marginal tax rate and assume that interest payments are tax deductible. So, the tax savings is 35 percent of the interest payment. Your program should use at least two function definitions and should allow the user to repeat this calculation as often as the user wishes.