A man is planning to retire in 15 years. Money can be deposited at 8% interest compounded quarterly, and it is also estimated that the future general inflation rate will be 6%. What amount of end-of-quarter deposit must be made each quarter until the man retires so that he can make annual withdrawals of $80,000 in terms of today's dollars over the 20 years following his retirement? (Assume that his first withdrawal occurs at the end of the first year after his retirement.) (Without using excel)