Authentic Thai rattan chairs are delivered to Gary Schwartz's chain of retail stores, called The Kathmandu Shop, once a year. The reorder point, without safety stock, is 200 chairs Carrying cost is $40 per unit per year, and the cost of a stockout is $70 per chair per year. Given the following demand probabilities during the lead time, how much safety stock should be carried? Demand During Lead Time Probability 0 02 02 100 200 02 300 0.2 400 02 The optimal quantity of safety stock which minimizes expected total cost is units (enter your response as a whole number)