We are doing activity type price planning by period. We entered machine and labor rates for period January - December 2009 using transaction KP26. We want to change these rates effective April - December 2009 and re-cost on April 1 using these new rates; however, when we do, instead of using the new rates entered for April-December it uses the average of the rates for January-December. Is there a way to only use the new rates?
We also tried entering the new rate for January-December, but when we re-cost anything now (which should use old rate) it uses the new rate.