Ellie wants to endow a college scholarship to honor her late grandmother. She wants to save enough money to support withdrawals of $15,000 per year (forever). Ellie will save to fund this scholarship for the next 20 years. The first scholarship withdrawal will be at the time of her last contribution to the endowment. While she saves money for the endowment, Ellie can earn 8% APR per year. Once she has funded the endowment, Ellie will move the money into a safe account that pays 3% per year. What yearly contribution must Ellie make to achieve her goal?