Southeast U's campus book store sells courso packs for \$15.00 each, the variable cost per packis \$12.00, fived costs for this operntion are \$240,000, and anatal salis are 125, o0o packs. The unit variable cost consists of a $3.00 royalty payment, VR, per pack to professors plus other variable costs of Vo =$9.00, The royalty payment is aegotiable. The book store's directors believe that the store should earm a profit marghin of 10 Si on sales, and they want the store's managers to pay a rogalty mate that will roduce that profit margin. What royalty per pack would permit the store to carn a 10% profit margin on course paclo, other things held coristant? Do nok round your htermediate calculations, a. $1,80 b. 52.58 c. 511.58 d. $2.70 e. 55.549