Joe Levi bought a home in Arlington, Texas, for $138,000. He put down 30% and obtained a mortgage for 30 years at 5.00%. (Use Table 15.1.) a. What is Joes monthly payment? (Round your intermediate values and final answer to the nearest cent.) Monthly payment $ 518.74 b. What is the total interest cost of the loan? (Use 360 days a year. Round your intermediate values and final answer to the nearest cent.) Total interest cost $