Inventory Champ calculators are designed to help merchants know how to increase profits by properly manipulating their inventory. The website features three Calculators to help manage inventory: 1. Economic Order Quantity Calculator or EOQ -- to determine how much inventory to order at one time ; 2. Forward Buying provides an analysis of purchasing situations just before a cost increase or when there are temporary "deals".; 3. Safety Stock Calculator -- what extra inventory should you have to achieve a service level goal.