Thank you very much for your help!
I have a final question: Is it possible within a measure to connect several if-statements?
If the ID is 11, then sum up ID 12, 13 and 14
If the ID is 15, then sum up ID 16 and 17
Edit: The thing is, I would like to calcuate subtotals in a table (which have an ID: 11 and 15 in the example, e.g. 11 for EBITDA, 15 for EBIT). Is there may a better way?