You are planning to buy an RV in 4 years that will cost $75,000. You will take out a 6-year, 8% loan to cover part of the cost. You don't want your loan payments to be more than $500 a month. You plan to cover the rest of the cost of the RV by making quarterly deposits over the next 4 years into an account earning 9%. How much do your deposits need to be be?