Wilson Trading Corp. agreed to sell David Ferguson a specified quantity of yarn for use in making sweaters. The written contract provided that notice of defects, to be effective, had to be received by Wilson before knitting or within ten days of receipt of the yarn. When the knitted sweaters were washed, the color of the yarn ‘‘shaded’’ (i.e., variations in color from piece to piece appeared). David Ferguson immediately notified Wilson of the problem and refused to pay for the yarn, claiming that the defect made the sweaters unmarketable. Wilson brought suit against Ferguson for the contract price. What result?