How do we control Buy side planning for Multiple Buys to Single Sell?

Hi Experts,

we have typical 3PL scenario to be rated.

Buy rate:
Maersk Ocean Freight (CNSHA-USLAX) - USD 1200/20 ft container
BAF : USD 200/ 20 ft container
CAF : USD 150/20 ft container
THC : USD 250/20 ft container

Local charges (done by 3rd Party called Y)
Port Fee : USD 75/container
Fumigation: USD 50/ container
Customs clearance: USD 10/shipment

Sell rate (by 3PL)
Ocean Freight (CNSHA-USLAX) - USD 1400/20 ft container
BAF : USD 200/ 20 ft container
CAF : USD 150/20 ft container
THC : USD 250/20 ft container
Port Fee : USD 90/container
Fumigation: USD 60/ container
Customs clearance: USD 30/shipment

per above example, we have one carrier (Maersk) providing Ocean freight having clear lane defined and other 3rd Party provider (say X) is providing local services, which are not basically geography based (as mentioned in buy rate)

But these services are packaged and sold as ONE to Customer (as mentioned in sell rate).

how do we map buy rates from two different providers to one Sell rate (with just one carrier). Please note local charges (buy) are Non Geographic rates.

So far, I have conceptual solution

Buy Rate offering(/Rate record - Ocean Freight, THC, BAF, CAF-Carrier Maersk
Buy Rate offering(Type - Non Geography)- all local charges- Carrier - Y (3rd party)

Sell rate (3PL)
with all charges

Request you to throw some light especially on planning and rating side

rds
Ashok Revuri