Diamond Boot Factory normally sells its specialty boots for $21 a pair. An offer to buy 120 boots for $13 per pair was made by an organization hosting a national event in Norfolk. The variable cost per boot is $9, and special stitching will add another $3 per pair to the cost. Determine the differential income or loss per pair of boots from selling to the organization. $:l ' Should Diamond Boot Factory accept or reject the special offer? v