The class sets are ordered once each year by Kumon, and the reorder point, without safety stock (dL), is 100 art sets. Inventory carrying cost is $10 per set per year, and the cost of a stockout is $50 per set per year. Given the following demand probabilities during the lead time, how much safety stock should be carried?

	Demand During Lean Time	Probability	Safety Stock	Stock-out Cost	Additional Holding Cost	Total Cost
	0	0.1
	50	0.2
ROP	100	0.4
	150	0.2
	200	0.1