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5. A company knows that they will sell 80,000 cases of #2 Pencils at a steady rate over the course of the next year. It costs them $12 a year to warehouse each case, based on the average number of cases in the warehouse, and it costs them $100 each time a delivery is made to their warehouse. How many orders should they place each year in order to minimize their total inventory costs? Assume that the orders are all of equal size. Round your answer to the nearest whole number. Numb er of orders