Freight Allocation on requisition or purchase order

We have an issue where we would not have to add freight as a line item on a requisition or purchase order. Freight is invoiced by our suppliers and it is not systematically matched when the invoice is processed. This leaves the line item that was created for freight on the PO open. It gets accrued by GL and we have to review each line accrued and then manually reverse the accrual and close the line item, Would anyone have a solution that would allow us to avoid this issue?

Thank You