7. They are curious to find out if college costs $80,000 in the first year, $85,000 in the second year, $90,000 in the third year, and $95,000 in the fourth year when their child gets into college in 20 years, how much is the total cost of a college education in today's dollars if the cost of money is 5%? Assume you pay the tuitions at the beginning of each school year.