Product costing run use the wrong planned price
I am busy with my budget for the next fiscal year. The costing variant that I used is as follow:
Use first the planned price 1 then planned price 2 then stander cost, ect. On my material master I have the following:
Planned price 1 valid date from 01.01.2009
Planned price 2 valid date from 01.07.2009
During the product costing run (costing date 01.01.2009 to 31.12.2009) it uses only the planned price 1 and not the average between the planned price 1 and planned price 2. I even swap the dates around as well. The system use only planned price 1 in my calculations. Is this correct? Should the dates on the material master not have an impact on the calculation? I swap the dates around for the material master as follow:
Planned price 1 valid date from 01.07.2009
Planned price 2 valid date from 01.01.2009
The product costing run was done only for period 01.01.2009 to 30.06.2009, but the system only used the planned price 1.
Is there some config setting that I need to change to accommodate this? Please assist.