Sum treegrid


I have a treegrid and i’m using ed[=sum] in the col type definition. The problem is that i only need this summatory in the 4th level of the treegrid, so i tried to use =sum in the xml with no success. Is there a way to do this??

Thanks in advance

This must work, but you still need to define column as math enabled, so you can use something similar to next


such definition creates second column as “ro” but with ability to understand math formulas , after that you can set
for necessary cells only