If you usually buy or sell in units different from the base unit of measure, you can specify separate units of measure for purchases and sales. To do this, you must set up units of measure in the Item Units of Measure window.
Open the Item Card window.
Browse to the item card for which you want to specify a default sales unit of measure code, and click the Invoicing tab.
In the Sales Unit of Measure field, click the AssistButton .
In the Item Units of Measure window, select the code you want to set up as the default unit of measure for sales, and then click OK to copy it to the field.
Entering Default Units of Measure Codes for Purchase Transactions