m33

. Dirk Ward borrowed $13,000.00 for investment purposes on May 9 on a demand note providing for a variable rate of interest and payment of any accrued interest on December 31. He paid $600 on June 13, $200 on September 22, and $1200 on November 19. How much is the accrued interest on December 31 if the rate of interest was 7% on May 9, 7.6% effective August 1, and 8.1% effective November 1? The accrued interest on December 31 is $ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)