Hi Experts,
My client wants to implement a process, where the Sales order (SO) quantity will be raised by the buyer with a certain extra quantity. To be able to profit from a special price condition for the to be ordered material 
The extra ordered goods need to be stocked as free available stock in the own store, where the Original requested quantity in the SO will be delivered to customer.
We tried to play with the Delivery schule lines in the Purchase order (PO), to add the extra needed quantity here, w.o. reference to the customer account assignment (but to be posted to free available stock). But after GR, the SO will be updated with the total quantity, regardless of the original quantity in the SO.
Any "neat" solutions to this challenge?
Thanks &
Regards!