[AccessD] Sort By Sum on Footer

Frankly, I think I'd just build an invisible group. 

Susan H. 

Sorry...Here's an example:
NAME   COUNT
Bob        23
Bob        14
Mary       10
Mary       40


Each name has a footer that has Sum(count)...What is the easiest way to sort
on this sum in the footer...so Mary's group would be listed first if sorting
descending?