Nora barrows $37500 on September 28, 2011, at 7%p.a. simple interest be paid on October 31,2012. she has the option of making payments toward the loan before the due date. Nora pays $6350 on February 17, 2012, $8250 on July 2, 2012, and $7500 on October 1, 2012. Compute the payment required to pay off the debt on the focal date of October 31, 2012.