Hi Saad
1. The values flow to SDI because the SDI is set up as a cost object.. This is controlled by the Account Assignment Category..
Go to the procurement tab of the Sales Order > Read the Req Type.. In the IMG, check the REq Class assigned to this REq Type and from REq Class, check the Account Assignemnt Category... If the AAC has consumption indicator E/V, then the SDI will become Cost object
The REq Type is determined based on MRP Group or Item Catg.. Check with your SD/PP guy
2. Now to settle this value to COPA, you need to settle the sales order (VA88) to COPA
Br, Ajay M