To enable the departments to automatically use the storehouse unit during the purchase request, "Storehouse Unit" on inventory item definition can be selected. But this is not a definite solution to the problem. In this situation, the unit that was defined on the inventory item price offers. During the price allocation, the offer unit automatically turns into the unit on the price offer. This unit can not be changed during ordered purchase either. Only by re-adding the inventory item through add record the wanted unit can be used. But, on places that have "Ordered Purchase" authorization, the unit can never be changed.