Fix KPI in a aggr function

[Maguelonne]

Hello all, 

I would like to fix a KPI whatever the filters selected. 

To count the number of unique X it works: Count(Distinct{1}(X)) but I am not able to fix the expression below:

sum(aggr({1}WE_Total_Cost_Max, PN1,PN2))

Thanks 

[Or]

Why are you summing aggr()? Why not just sum the value?

[Maguelonne]

because I can have duplica such as:

total cost=5, PN1=a, PN2=b, c=x1

total cost=5, PN1=a, PN2=b, c=x2 

and I would like to have the total cost=5  and not 10. it is why I take the sum aggregated on PN1 and PN2