The General,
You should try to get them tracked counting each game as 1 unit. Because some people bet 5,8,10, 20 units on games while others bet 1 unit on games. Tracking each play as 1 unit will not mislead anyone.
I would say someone up 50 units betting 1-3 units max on plays is a bigger accomplishment then someone up over 100 units betting 5-10 units.
But thats just one persons opinion.