A loan of R850000 is granted at a rate of 13,5% p.a. compounded monthly. The loan is to be amortised by means of regular equal monthly payments

of R17400, starting one month after the loan is granted, and a final payment F (F < R17400) due one month after the last equal payment of R17400.

When the thirty-seventh, thirty-eighth, thirty-ninth and fortieth payments are missed, the situation changes. At the time when the thirty-ninth

payment was due, the interest rate increased to 13,56% p.a. compounded monthly. If new regular equal monthly payments of R18000 are made,

starting one month after the last missed payment, then the new final payment F* (F*

Is equal to R