Yes, that is exactly the logic I was looking for. Thank you!
But how can I make this with variables instead of the fixed numbers (A00713,A00249,...)? Maybe my question was not precise enough, but the list with the data goes on and I want QlikView to always calculate the new column. E.g. when new orders A00534, A00535,... are made and new confirmations come in, I want the programm to automatically update the chart.