I configured my process to collate all shipment cost document under 1 PO for the whole week. The challenge I have is if I view the PO under ME23N, it'll only show the first shipment cost document. You can see all shipment cost document in PO history and on the limit tab you can see the 'Actual Value'.
The process I designed is I want my users will send the PO first, vendor can then double check all the entries in their PO, and then they can send invoice and add or notify us of any disputes/claims in our PO (say if we miss anything). The problem is the PO is practically useless, is there a way we could itemize all the entry in the service entry sheet? example, shipment cost document 1234 would be item 10, shipment cost document 2345 would be item 20 and so on and so forth.