Hi,
Unless you gives enough input to Zcondition type - how your Zcondition type woks for unit of measure KG or TON?
In stead of changing Zcondition type for your specific requirement and now you with your business needs decide- better order material with same unit of measure
Line items --------UOM
10-----------------TON
20-----------------TON
======or========
10-------------------KG
20-------------------KG
Regards,
Biju K