A demand loan of

$6000.00

is repaid by payments of

$3000.00

after

two

years,

$3000.00

after

four

years, and a final payment after

six

years. Interest is

7%

compounded

quarterly

for the first

two

years,

8%

compounded

monthly

for the next

two

years, and

8%

compounded

quarterly

thereafter. What is the size of the final payment?

The final payment is

$nothing.

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