In the Inventory module, an item’s reference margin(s) cannot be set to 100% unless it a non-inventory item. An item with a price based on a non-zero cost, cannot have a 100% margin. If you set an item’s reference margin (Ref) to 100, and the Non-Inventory check box is not selected, you will see the following message:
An item’s reference margins are set in the Inventory module, on the Pricing tab in the Pricing Levels pane.
If you have questions or suggestions about this information, contact email@example.com.