Cumulative Sum

Hello there,

I found an old D6 ticket about this, but does anyone know how to calculate a cummulative sum in views in D7?

Something like this:

Score - Cumulative
+10 | 10
+9 | 19
-5 | 14
-10 | 4

Ideally I'd even like to graph that out.

--- a hint towards another approach ---

If views can't do it, I guess I'll have to find a way to use rules to load the "last submitted" value for this field, have rules fill in a hidden "previous value" field and use that one to do the math with using calculated field. But maybe there's a better way.

Cheers,