Hi Balaji,Create
DSO1 for 2lis_12_vcitm
DSO2 for 2lis_11_vaitm
DSO3 with Dev no. and Dev item as key and sales doc, sales doc item and order qty as data fields.
When you load data from DSO1 to DSO3 , look up sales order qty from DSO2 based on sales order and item present in DSO1.
Thanks,
Shailesh.