please show work with financial calculator. I want to learn. thank you

9) Christian wants to retire in 15 years when he turns 65. Christian wants to have enough money to replace 75% of his current income less what he expects to receive from Social Security at the beginning of each year. He expects to receive $18,000 per year from Social Security in today's dollars. Christian is aggressive and wants to assume an 7% after-tax annual investment rate of return and an inflation rate of 3% per year. Christian expects that he will live to be 95 years old. If Christian currently earns $80,000 per year and he expects his raises to equal the inflation rate, how much does he need at retirement to fulfill his retirement goals