I want to reset actual prices of activities for cost center group. But when I did it I don't have any actual prices for all cost centers. How can I reset prices of activities only for cost centers which include in the cost center groups?
I am not getting your point clearly but what I understood is that you could not get success in resetting Actual Activity Price calculation and you want to reset and recalculate it. Am I right?
First point is why you want to reset it? If you do this the allocations which have already been done basing existing actual price will be reversed.
Even then if you want to do this, then go to KSII Select the period to be reset and then got to main menu under EXTRA tab you will find RESET. Click it it will give you warning that by resetting this all allocations will be reversed. Click enter. It is reset now.