by Kimber Warden.
Unfortunately, my coding skills aren't sufficient to be of much use to you. I had hoped you could just insert a little PHP script into a label, but on further investigation, Moodle doesn't allow that.
So you'd have to write something a little more involved. I did find some information about how to get information from the database to use in your code: http://docs.moodle.org/dev/Data_manipulation_API, but that's as far as I can probably help you. Good luck!