because each member of the supply chain only needed 1,000 units to meet actual demand, plus 100 units for the potential forecasting error, this particular supply chain carrying 705 units too many (210-100)+(331-100)+(464-100). Dividing 705 by 4,400revcalsa 16.0-percent supply chain-wide inventory overstock. Inventory carried for total demand error (safety stock) is 1,105 (100+210+331+464), or 110.5 percent of actual end-use demand!