The annual demand for a part is 100,000 and the quantity ordered at any one time 10,000. The sigma (standard deviation) is 350. Lead time is 4 weeks. The service level is 90% (Z = 1.28) What is the safety stock and the reorder point? Calculate the available to promise using the following data. There are 30 units in stock. An item costing $10 has carrying costs of 20% and ordering costs of $50. Weekly demand is 100 units. The company works 52 weeks a year. What is the economic order quantity? What is average inventory? What is the number of orders placed per year