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 $80 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 0.2 100 0.2 200 0.2 300 0.2 400 0.2 The optimal quantity of safety stock which minimizes expected total cost is units (enter your response as a whole number)