A demand loan of $4000.00 is repaid by payments of $1500.00 after two years, $1500.00 after four years, and final payment after eight years. Interest is 9% compounded quarterly for the first two years, 10% compounded monthly for the next two years, and 10% compounded quarterly thereafter. What is the size of the final payment?

The final payment is $. (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)