Transfer the purchase order into Project

Hi All

I want to transfer the purchase order in to the project which is created outside the PO, the status of the PO is invoiced.

I was thinking to pass the Item Journal (PO is of stocked item), but it is taking the running cost of the item, how i can put the Purchase price on the journal.

And also if the PO is non-stocked how i can put the cost in the project in the same scenario.

please advise