Mr. Pitkin bought a farm and promised to pay $7550 in 6 years with 7.5% simple interest and $10175 in 14 years with 10.25% simple interest. Later, Mr. Pitkin met with the lender requesting to pay $7600 at the end of 4 years and to make a final payment at the end of 11 years. Based on a simple interest rate of 13.5%, determine the amount required to settle the debt at the end of 11 years. $