Costing Sheet - Crediting Material Overheads and Production Overheads

I have set up the costing sheet and I need to define Credit KEY. The issue here is that Based on my material I need to credit different cost centers for my overheads.

Example:

Material X has Origin Group Pharma - Material Overheads Credited to Cost Center ABC

Material Y has Origin Group Valves - Material Overheads Credited to Cost Center XYZ

I tried this but the issue is the Validity date cannot be the same. In this case the system still picks up the earlier validity date.

Kindly help here.

chandand