Add freight charges to Drop Ship orders

Hi Experts,

We have a unique requirement.

1. Drop ship Order line is created. PO is created and given to our supplier.

2. Supplier ships the goods to the customer directly.

3. Logical receipt is done to close and invoice the order line.

Betwee step 2 and step 3, the freight charges are calculated based on the distance to the customer. During logical receipt, there is no provision to enter the freight charges into the system (this is done by the shipping team).

Does anyone have an idea of how to achieve this?

Thanks,

Giridhar