Can’t robots potentially cost more than $15 an hour? Maintenance, repair, amortized cost, upgrades?
Thanks to miniaturization and improved quality of electronics, probably not.
$120k/yr is a lot of wages and that is if a robot replaces just one position three shifts per day seven days per week.
I think in this context “robot” really means the ordering kiosk rather than some humanoid robot.
Even if it referred to one of the new burger makers that makes 350 custom burgers per hour, which is probably pretty pricey, something like that would replace several workers and last ten years. Even a million bucks would be a bargain if it replaced two positions for ten years.