Transportation for procurement

Hi Team

I have a requirement

Customer wants to receive the purchase receipt using transportation module and apply freight based on the item size and weight in procurement .

with all setup for Transportation module , how the freight amount will be distributed based on the receipt document provided by the supplier or the freight forwarder.

say

Freight amount is 1000 (Provided by the carrier) , how to include this freight amount to be distributed to the respective item, based on the size and weight.

If anybody can explain the how to use transportation module in procurement will be grateful.

Thanks

Raja