summarize column with preceeding rows

Hi,

i hope someone could help me on my small problem to solve in PowerBI. In sql i would use window functions like "sum(work_diff) over (partition name order by name, date rows unbounded preceding)"

My data table is something like 

i am searching for the "wanted result" column. In that column should be the summarized value of "work_diff" with all preceeding rows included. I tried already summarize and sumx, but i cant get it working.

Maybe someone could help.

THANK YOU

Ron