Diamond Boot Factory normally sells their specialty boots for $32 a pair. An offer to buy 90 boots for $25 per pair was made by an organization hosting a national event in Norfolk. The variable cost per boot is $12 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. Enter the amount as a positive number. Differential per pair of boots from accepting the special order is $ income loss