Problem with a key figure restriction

Hi,

I have a problem with one key figure in report: in infocube, this key figure is aggrigated for all the profit centers (summation). In infocube, there is a value '150' for each profit centers (100 pieces) and in the report it is counting 150*100=15000. However, it shouldn't count the sum of all entries in the infocube but show only one value in the report which would be '150'.

I think this should be possible to do but I just don't know how. Hope somebody is able to help me. Thanks in advance.