Thomas Kratzer is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation.? Thomas's fastest-moving inventory item has a demand of 5,800 units per year. The cost of each unit is ?$98?, and the inventory carrying cost is ?$99 per unit per year. The average ordering cost is ?$29 per order. It takes about 55 days for an order to? arrive, and the demand for 1 week is 116 units.? (This is a corporate? operation, and there are 250 working days per? year.