00000 Annual demand for a particular halogen bulb is D = 3,600 at a business that operates 300 days per year. The cost per order S = $25 and the holding cost per unit per year is $2. If the lead time is 5 days, and demand during lead time follows the empirical distribution given in the following table: Que Not Paint PR Number of Units Probability 30 .10 40 .10. 50 .15 60 .30 70 .15 80 .10 90 .10 What level of safety stock is required to ensure a 90% service level? Select one: a. 20 b. 30 c. 40 d. 50 e. 60 14