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1. (10pts) A retailer can buy copies of a weelly magazine for 5 dollan and sell them for 15 dollars. The fctailer is able to receive I dollar for recyeling an unsold copy. The demand for magazine for the week is normally distributed with mean 400 and uandard deviation 30 (as a Newsvendor problem). What is the optimal order copy for magazines to minimize the total cost? 2. (10pts) Assume that there are 250 working days in a year, and the annual dernand for a certain product is 600 units with a standard deviation of 20 . Lead time for this product is approximately normal, averaging. 10 working days with a standard deviation of 3 days. a) What reonder point provides a service level of 90 percent? b) If you have a chance to reduce the deviation of either demand or lead time, which one you prefer and why? 3. (10pts) The following table lists the demand requirements with other data for the upconing four quarters in a manufacturing factory. What is the total cost of pursuing a chase aggregate plan over the coming 4. (10pts) A company produces a product for which the annual demand is 10,000 units. Production averages 100 per day, while demand is 40 per day with holding cost $2.00 per unit per year and setup cost $200.00. If the company wishes to produce this product in economic batches, what size batch. should be used? What is the maximum-inventory level? How many order cycles are there per year? How much does management of this good in inventory cost the firm each year? 5. (10pes) The demand of a manufacturing part for months 1 to 8 is in the following table. The setup cost of the item is $150 per order and he holding cost is $.75 per month. Lead time is 0 . Calculate the planned order releases using: (a) the Lot-for-Lot technique, and (b) the POQ technique. What are the costs of each plan. includine the holding cost of any inventory left over after month 8 ? 4. (10pts) Uise Johnson's Rule to determine the optimum processing sequence fot the jobs listed below: Processinu Tinan iminuas Chart total throughput time. What is the throughput time of the system? Whas arc the idle times for the two centers? 7. (10pts) A supply chain consists four members, a manufacturer, a wholesalet, a distributor and a retailer, from upstream to downstream. In the supply chain, the manufacturer sells to the distributor who sells. to the wholesaler who sells to the retailer. Last year, the retailer's weckly variance of demand was 4,000 units. The weekly variance of orders was 5,000;3,000;12,000; and 17,000 units for the retailer. wholesaler, distributor, and manufacturer, respectively. (Note that the variance of orders cquals the variance of demand for that firm's supplier.) Calculate the bullwhip measure for the retailer. wholesaler, distributor and manufacturer. Which firm appcars to be contributing the most to the bullwhip effect in this supply chain? Which firm appcars to be contributing the most to a dampening scenario in this supply chain? 5. Shist Questions (30pts) (a) What are the similarities and differences between Pull and Push systeass? (b) Describe how to utilize the concept of Lean Operarions to achieve the business processes for LowCostidirines. (c) Please address how airline companies, travel agents, hotels and restaurants may cooperate one another through the consepts of Revenahe. Managemem