Inventory Control Jesaki Publishing sells 50,000 copies of a certain book each year. It costs the company $1 to store a book for one year. Each time that they print additional copies, it costs the company $1,000 to set up the presses. NOTE: We assume that the demand is uniform. Let x= number of books printed during each printing run y= number of printing runs Use the Inventory Control information above to answer this question. In order to write the total cost as a function of one variable, we must find a relationship between x and y. Since Jesaki prints a books in each of the y printing runs, the total number of books printed is ay, so we must have xy= We can use this to express y as a function of a.