That's interesting.I never underwent any orientation, so I don’t know if that was part of the training. But then again, I had started the job when I was in my mid-40s (almost two decades of being a stay-at-home mom made returning to the office-type of job I was accustomed to a bit harder to accomplish), so I guess they figured I didn’t really need it as much, maybe.
However, I did find some websites where one can practice making change. When I first started cashiering, I wanted to make sure I knew how to do that in case the registers went kaput and we had to go retro in that department.
Only one of the retail jobs I had did any real training, and it was a locally-owned business that cared about its employees and customers. That experience surprised me in many ways with the little things that can make a difference in how you work retail and interact with customers. One of those little things was learning how to count back change. It's not just doing basic math, though that's part of it. There are two purposes to counting back change: (1) to get more personalized contact with the customer through this interaction, and (2) as a check on yourself to help ensure you are giving the customer the correct change back, reducing errors in both giving too much cash back or too little. And it worked really well for this. It was such a little thing, but it surprised me with how nicely it worked. But it is a skill that needs to be taught.
I don't fault kids working at these impersonal corporate buisiness for not being trained how to do this, or making mistakes. They weren't trained right. And since they're young, they are not likely to do what you did and teach themselves how to count back change. Why would they, in a place where they are viewed as an expendable and easily replaceable human resource commodity? One can argue they should have a professional mentality regardless, but I've got a hard time faulting it. It makes me wonder if the problem has a lot more to do with a failure of proper apprenticeships and valuing employees and work communities than it does with math skills...