How to allocate trade operation charges to item cost from 3rd party freight forwarder?

Summary:

How to allocate trade operation charges to item cost from 3rd party freight forwarder?

Content (please ensure you mask any confidential information):

We have a dedicated freight forwarder who picks the products from Supplier and delivers to our warehouse. For this, we prepare a service purchase order and pay the freight forwarder. Now client wants the amount should be also allocated to the item cost for that specific Purchase order which the forwarder delivered. Is there any way we can handle this in LCM? One Service Purchase Order for One Item Purchase order. Service PO with Freight Forwarder and Item PO with Supplier.