500
Some Walmart employees say customers are getting hostile at self-checkout — and they blame anti-theft tech
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
Kinda what I meant, too.
In more modern places, they have little machines that they can solve any issue without having to stand up.
In older places, they have to walk around, and they are assigned to like 6-10 machines.