Wrong grand total column with if statement in calculation DAX measure

[Ju7438]

Hi everyone, 

Im strugleling with on of my measure in matrix viz, see the following measure :

I said right blank if the calculation is negativ or just do the calculation, but the grand total in matrix still the same, see the matrix result :

How can I force the right grand total ?

Thanks in advance for your advices.

BR

Julien

[Jihwan_Kim · Accepted solution]

Hi,

Please check the below measure whether it suits your requirement.

V3 measure: =
SUMX ( DISTINCT ( calendartable[Mois] ), [total_days_billable_retreated_V2] )