Hi,
Have you tried or not in the system. What is your requirement? Your output should be as below as per your first message. Am I right or not?
String_2 1071 1071 578,123
Have you created formula variables on each of the characteristics?
((FMCH#1 == FMCH#2) * SUM) + ((FMCH#1 <> FMCH#2) * SUM) is a formula with boolean operators.
IF FMCH#1 equals to FMCH#2 then SUM displayed in the report else SUM will be zero.
You can suppress the rows with SUM value <0 by defining the condition on newly created formula keyfigure.
Regards,
Satya.