A woman buys a house for a $345,000. She pays $50,000 down and takes out a mortgage at 3.9% for 20 years on the balance. Find her monthly payment and the total amount of interest she will pay. The woman will make payments of $ (Do not round until the final answer. Then round to the nearest cent.) The total amount of interest the woman will pay is $ (Do not round until the final answer. Then round to the nearest cent.)