Kevin is planning to retire in 15 years. He deposits money for his retirement at 8% compounded monthly. It is estimated that the future general inflation (f bar) rate will be 4% compounded annually. What deposit must he make each month until he retires so that he can make annual withdrawals of $50,000, in terms of today's dollars, over the 10 years following his retirement? (Assume that his first withdrawal occurs at the end of the first six months after his retirement.)