In SAP Business One, users can distinguish between sales unit and purchasing using. For example, an item that is purchased in creates of 12 bottles is sold in packages of 6 bottles.

The purchasing unit is "crate with 12 bottles", and the sales unit "package with 6 bottles". One sales unit contains half a unit of the purchasing unit.

All sales transactions, including the associated documents, are performed with the sales unit. However, the warehouse stock is managed on the basis of the smallest unit, which, in this example, is a bottle.