Agree with Ajay: If you have different fields, you dont need point of valuation to create your reports.
In my case, i don't like have different fields, so i create a characteristic in order to diferentiate the records.
Other point: you want to analyze your COGS by Cost Element? or want to just compare 'standard CCS' and 'Actual CCS' for every material, without considering sales qty and values ?
Arturo.