I need help with this two question. Please show work
A product has demand during lead time of 90 units, with a standard deviation of 40 units. What safety stock provides (approximately) a 95% service level?
A) 95 B) 65 C) 125 D) 155
Given an EOQ model with shortages in which annual demand is 5000 units, Co = $120, Cc = $15 per unit per year, and Cs - $40, what is the annual carrying cost?
A) $1315 B) $1059 C) $1296 D) $1495