Use parameters to create conditional columns

Hey chutli ,

that was a little trick, but try the following measure. I guess you have to adapt it to your tables:

ServiceLevel = 
VAR vClassA = SELECTEDVALUE('Input_Service Level - A'[A Value], 1) -- Name of your Slicer table and column
VAR vClassB = SELECTEDVALUE('Input_Service Level - B'[B Value], 1)
VAR vClassC = SELECTEDVALUE('Input_Service Level - C'[C Value], 1)
VAR vAverage =
    AVERAGEX(
        Data_Master,
        VAR vRowClass = Data_Master[ABC_Class_Cost]
        RETURN
            SWITCH(
                vRowClass,
                "A", vClassA,
                "B", vClassB,
                "C", vClassC
            ) * 1
    )
RETURN
    vAverage