Connection between FPLT-FPLNR & Network

[unurd]

Hi guys,

Can anyone tell me the connection between FPLT-FPLNR & PS Network.
There is a purchase requisition from the network and then a purchase order.
But from there I cannot find the billing plan number/invoicing plan number.
I have FPLT-FPLNR, how do I find the network?
Tried with AFKO & AFVC but the numbers in the Project builder and the purchase order are not the same, no match... :+(

Please assist.

Thanks, Amos