Posting in Quantities 
Posting of financial statement items in quantities is possible if:
· the document type allows posting in quantities
· the breakdown category of the item is defined with a breakdown by quantity
A fixed value is assigned to the unit of measure in the breakdown category, which means that the breakdown category of the item determines the unit of measure.

In a journal entry you may want to post to items, which have been assigned different breakdown categories with different units of measure. In this case you would post quantities in several units of measure within a single journal entry. The system does not check for a zero balance – neither for each unit of measure nor for the entire journal entry.