Things common to all systems Unit Selling Price: $129.99 Unit Margin: (% of Selling Price) 32% Delivery Change (per Order): $50.00 Operating Time (weeks) 52 Lead Time (weeks) 2 Sigma sub d EXCEL STDEV Holding Cost: %% of inventory investment Unit Margin (Dollars): unit sell price * margin Unit Cost: Sell price -unit margin H - Holding Cost: sell price "(1-margin) "Hold! D = Annual Volume = dBar * 52 wks d bar = Avg. Demand (Wkly) EXCEL AVERAGE 5 - Ordering Cost/Order $30.00