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please answer this questions . previously some expart gave wrong answer

ACold Inc is a frozen food distributor with 10 warehouses across the country. Ivan Tory, one of the warehouse managers, wants to make sure that the inventory policies used by the warehouse are minimizing inventory while still maintaining quick delivery to ACold's customers. Since the warehouse carries hundreds of different products, Ivan decided to study one. He picked Caruso's Frozen Pizza (CFP). Average daily demand for CFPs is normally distributed with a mean of 416 and a standard deviation of 151. Since ACold orders at least one truck from their supplier each day, ACold can essentially order any quantity of CFP it wants each day. In fact, ACold's computer system is designed to implement an order-up-to policy for each product. Ivan notes that any order for CFPs arrives 5 days after the order. a. Suppose an order-up-to level of 2439 is used. What is the expected on-hand inventory? Use Table 14.1 and round to nearest integer. 114 TABLE 14.1 The Distribution Function, Fir), and the Inventory Function, z), for the Standard Normal Distribution Function 1(x) 1(2) F(x) F(x) 2 z 5398 0.4509 0.1 0.0000