Field help (DADUOM)

For an "Entered" Distribution type, enter the distribution non-financial unit. This non-financial unit will be used as the basis for the prorate distribution calculation to the receiving dimensions.
Only those dimensions that contain a value for this unit will act as "receiving" dimensions to the distribution and will consequently be involved in this setup.
Regardless of the percentage to distribute, if the non-financial unit is not defined, the distribution prorate share will be calculated on the basis of the receiving dimensions.