Exercise: Given S= 61.80 . Mean of Demand/week = 20, SD of Demand/Week = 4, Lead time = 2 weeks . Underage Cost = 3 per unit, Overage Cost = 2 per unit per period . Selling price = 100 and unit cost = 80 per unit . Calculate expected fill rate, expected backorder, expected on hand inventory and expected on-order inventory and profit per week