VT19- Order Receipt/Orders Balance

Hi All,
I have some line items in RPSCO and COSB table for VT19 Order Receipt/Orders Balance against WBS OBJNR.
As per my understanding these line items may get resulted because of incoming order. But I am not able to figure out exact transaction/posting/document for them.

Can you please suggest if there any such report or somthing is available to go into depth of VT 19 details.

Thank You,