Additive cost for cost estimate in case of stock transfer

Dears,

I read something on the library but i don't know exactly what to do.

My aim is adding a % of intercompany profit when i determine the cost estimate through stock transfer.

Scenario (Cross-company costing is active):

- CO Area XXX Company AAA Plant AA1 Material 1000 Proc.type F Sp.proc.type 40

- CO Area XXX Company BBB Plant BB1 Material 1000 Proc.type E

Cost of Material in plant BB1 is € 100,00

Cost of Material in plant AA1 should be € 100,00 + 15% mark-up = € 115,00

According to SAP library i can use the Additive cost functionality to do it. Suggestions?