Sidney borrows $18,000.00. The loan is governed by compound interest and the annual effective rate of discount is 6%. Sidney repays $3,200.00 at the end of one year, X at the end of two years, and $2,000.00 at the end of three years in order to exactly pay off the loan. Find X. Round your answer to the nearest cent. Answer in units of dollars. Your answer must be within 0.0%