Maurice and Trisha want to buy a house. The bank requires a 10% down payment and a combined annual income of a?

Maurice and Trisha want to buy a house. The bank requires a 10% down payment and a combined annual income of at least 1/3 of the remaining amount to qualify for the loan. Based on their combined annual income of $63,000 a year, what is the price of the most expensive house the bank will allow them to buy?