Required a. Determine the bookstore's annual break-even point in sales dollars. $ b. Assuming an average textbook has a suggested retail price of $125, determine the bookstore's annual break-even point in units. units describe the effect on bookstore profitability of shifting sales toward more used and fewer new textbooks. x bookstore profitability with the same unit sales. Note: Round your answer to the nearest whole dollar. $ 6 e. For a project with predicted sales of 10,000 new books at $125 each, determine 1. The bookstores' unit-level contribution. 2. The publisher's project-level contribution. $ 3. The author's royalties. $