t. The setup cost is a one-time cost of $2000, and the annual warehouse cost is $9 times the maximum number of books stored. Let's denote the number of books printed in each print run as x. The number of print runs per year can be calculated by dividing the total number of books needed per year (6000) by the number of books printed in each print run (x). The total cost can be calculated as the sum of the setup cost and the annual warehouse cost. The annual warehouse cost is the product of the maximum number of books stored (x) and the cost per book ($9). Therefore, the total cost function can be expressed as C(x) = 2000 + 9x(6000/x). To find the number of books that should be printed each time there is a print run to minimize the cost, we need to find the value of x that minimizes the total cost function C(x). solve for x