Cross Company Costing - Costing Sheet

Hello,

We are changing our cross company costing model. Currently we are applying a material overhead and freight and duty through a custom program with additive cost estimates. We would like to get away from this and use standard SAP functionality.

Does anyone have experience with:

1. When cross-company costing using special procurement keys, the costing process wants to select the costing sheet in the valuation variant for Finished and Semi-Finished goods instead of the Overhead on Material Components. We would like to have the costing process select the Overhead on Material Components costing sheet instead.

2. We would like to over-write the base value in the costing sheet calculation in some instances, based on information from the material / plant.

Looking forward to any advice you may have...

Kind regards.