PO return with freight reclaim from supplier

Dear gurus,

I intend to create a PO return with the freight charges agreed to

refund by the vendor. I've set the indicator for return in PO and

it works perfectly but how do I add in additional freight

charges condition type with the proper value (to indicate the amount for refund from the vendor)? E.g. My PO item

return value is $100 and the cost for freight is $10. The system

will show me $90 as net value instead of $110. Is there anyone

out there has experienced the similar case? Alternatively, shall

I split out the claim in another PO line item or shall I handle

it separately by waiting for the credit note from the vendor (which will be handled by the FI). What is

the best practice? What happen if my end user wanted to show the freight charges to be captured in the PO return. How could I do that in PO return?

Appreciate for your help as it is very urgent.

Thank you.

Regards,

Edwin Fu