Multiply two measures column

Hi norazlina0210 

you can try

Overall Yield Rate =
VAR AcousticRate =
    CALCULATE (
        DIVIDE (
            SUM ( 'BTE Raw Data'[Rejected Qty.] ),
            SUM ( 'BTE Raw Data'[Inspection Qty.] )
        ),
        'BTE Raw Data'[Taype] = "ACOUSTIC TEST"
    )
VAR ListeningRate =
    CALCULATE (
        DIVIDE (
            SUM ( 'BTE Raw Data'[Rejected Qty.] ),
            SUM ( 'BTE Raw Data'[Inspection Qty.] )
        ),
        'BTE Raw Data'[Taype] = "LISTENING"
    )
RETURN
    ( 1 - AcousticRate ) * ( 1 - ListeningRate )

Hi norazlina0210 
Actually I was waiting you to ask me for this 🙂 
Yes there is a way but is not perfect. This would be using row totals as follows:

1. From the format settings > activate row totals.
2. Modify the existing measure [Yield Rate] as follows:

Yield Rate =
VAR YieldRate =
    DIVIDE (
        SUM ( 'BTE Raw Data'[Rejected Qty.] ),
        SUM ( 'BTE Raw Data'[Inspection Qty.] )
    )
VAR AcousticRate =
    CALCULATE (
        DIVIDE (
            SUM ( 'BTE Raw Data'[Rejected Qty.] ),
            SUM ( 'BTE Raw Data'[Inspection Qty.] )
        ),
        'BTE Raw Data'[Taype] = "ACOUSTIC TEST"
    )
VAR ListeningRate =
    CALCULATE (
        DIVIDE (
            SUM ( 'BTE Raw Data'[Rejected Qty.] ),
            SUM ( 'BTE Raw Data'[Inspection Qty.] )
        ),
        'BTE Raw Data'[Taype] = "LISTENING"
    )
RETURN
    IF (
        HASONEVALUE ( 'BTE Raw Data'[Taype] ),
        1 - YieldRate,
        ( 1 - AcousticRate ) * ( 1 - ListeningRate )
    )

Now the problem would be that there will be two totals. One for [Yield Rate] and one for [Inspection Quantity] which might not make sense to you. but If it does based on whatever logic then we can apply this logic the [Inspection Quantity] measure's formula same as we did with the [Yield Rate] measure. Otherwise, we can just blank out the values of the total or just hide the column manually. Please advise how you would like to proceed.