A variable rate demand loan showed an initial balance of $7000.00, payments of $3500.00 after six months, $3500.00 after 21 months, and a final payment after four years. Interest was 9% compounded quarterly for the first 21 months and 9.4% compounded monthly for the remaining time. What was 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.) X i 1 " V. More Enter your answer in the answer box