Currently Being ModeratedJan 7, 2013 4:06 AM (in response to TinePorath)
I found this on https://discussions.apple.com/message/18854920#18854920
("More Like This" to the right of your message)
You could try this:
(The checkboxes from my example have shown up here as TRUE/FALSE, but the principle is the same).
Cell at the botton (B8) contains =COUNTIF(B2:B7,TRUE)
Hope this helps.
Currently Being ModeratedJan 7, 2013 7:06 AM (in response to TinePorath)
For a column with nothing be checkboxes in the body rows, you can shorten Ian's expression by using the whole-column shortcut notation: