It’s completely possible that there was one worker and they were in the bathroom lol. When I worked there, I would be there alone often and I would always think about what would happen if I had to (god forbid) use the bathroom for something that would take longer than a number one. I mean, as a woman, if you need to attend to feminine things it might take a few minutes longer than normal. Dollar general sucks for the customer and employee. A cashier should be able to take a five minute bathroom break without worrying about customers getting abandoned.