#+COLUMNS: %ITEM %8GRADE %TAGS
* Document                                                  |          |                 | 
** defaults                                                 |          |                 | 
*** default to compacting with the arithmetic mean function |          | :grade=mean(^): | 
** student grades                                           | 3.5      |                 | 
*** 1999                                                    | 3.5      |                 | 
**** John Smith                                             | 3.5      |                 | 
***** test paper 1                                          | 3.0      | :grade=3:       | 
***** test paper 2                                          | 4.0      | :grade=4:       |