The following data relate to a company that produces and sells a travel guide that is updated monthly $6,000 2000 72.000 Fixed costs: Copy editing Art work Typesetting Variable costs: Printing and binding Bookstore discounts Salespersons' commissions Author's royalties $3.20 per copy 400 per copy 0.50 per copy 2.00 per copy Each book sells for $20.00. The company sold 8,000 books in June and 10,000 books in July The break-even point in units is