How to create a dax calculation which doesnt change after dimension filter

Hi Everyone, 

I have a little pickle. I have this calculation i use to calculation a fee i have to pay a provider. this fee is based on the min max amount of a total number. The number works out fine. Here is the calculation;

Amount_Staffel_PAO = 
VAR CorrectStaffel =
    FILTER (
        Dim_Staffel_PAO,
        Dim_Staffel_PAO[MIN] < [Amount_Segment_PAO]
            && Dim_Staffel_PAO[MAX] >= [Amount_Segment_PAO]
    )
RETURN
    CALCULATE (
        SELECTEDVALUE (Dim_Staffel_PAO[Fixed Comp.] )
            + SELECTEDVALUE ( Dim_Staffel_PAO[Price] )
                * ( [Amount_Segment_PAO] - SELECTEDVALUE ( Dim_Staffel_PAO[MIN] ) ),
        CorrectStaffel
    
    )

The issue is when i try to slice the result of this dax calculation into our suppliers. the number is for example 500 usd. but when i slice it to show me the split of this 500 on supplier level. the calculation changes it to 350 for one and 250 for the other supplier. I believe this happens because dax first splits the data into the dimension then checks the max min amounts for the fee and that would be higher because low amount = higher fee. 

So my question, can i get the total number i have to pay and then split it on the supplier within this dax calculation?

Regards,

Ahad