Cumulative Sum

Hi everybody,

I'm learning PBI and I would like to create a matrix table to calculate :

-In a first column : the total turnover by month

-In a second column : the cumulative turnover

I would like to get this result :

I've created a measure TURNOVER which works well :

TURNOVER = 
VAR
DebutCA = SUMMARIZE('Parametres comptes';'Parametres comptes'[DebutCA])
VAR
FinCA = SUMMARIZE('Parametres comptes';'Parametres comptes'[FinCA])
VAR
JournalVentes = SUMMARIZE('Parametres journaux';'Parametres journaux'[JournalVentes])
RETURN
CALCULATE(sum('Journaux 3 ans'[Solde]);
'Journaux 3 ans'[Compte]>=DebutCA;
'Journaux 3 ans'[Compte]<=FinCA;
'Journaux 3 ans'[Journal]=JournalVentes;
)

I would like to create a measure to calculate cumulative turnover.

I don't know how to proceed.

I tried differents measures but it doesn't works...

Thank you for your help.

Sincerely