You just turned 30 and your father made you the following deal: You invest $2,500 each year from now until age 65 (with the first investment to be made immediately) into an account earning 9% annually. On your 40th birthday, he will give add one payment (and only one) to your account. You want to have $1 million on your 65th birthday. How much must he give you on your 40th birthday to ensure that you exactly hit your target?