Question 28 Reference: 04-04 The following data relate to a company that produces and sells a travel guide that is updated monthly: Fixed costs: Copy editing $6,000 Art work $2,000 Typesetting $72,000 Variable costs: Printing and binding $3.20 per copy Bookstore discounts $4.00 per copy Salespersons' commissions $0.50 per copy Author's royalties 152.00 per copy Each book sells for $20.00. The company sold 8,000 books in June and 10,000 books in July. What is the unit contribution margin per book? $8.30. $10.30 $14.30 $10.80