Hi all,

I recently wanted to use org-mode to do some simple calculations where
estimate values would hierarchically bubble up a tree, in a similar way to
checkbox percentages e.g.


* Total Effort [110]
** Task 1 [45]
*** Task 1.1 [20]
*** Task 1.2 [10]
*** Task 1.3 [15]
*** Task 1.4 [10]
** Task 2 [65]

Non leaf nodes would have their values automatically updated on a C-c C-c
to the sum of their children.  Is there a way of doing something similar to
this at the moment?  Maybe with property drawers or otherwise?

R.