I think you're right. When I worked as a cashier in high school, I learned how to punch in numbers, but sometimes the machine wouldn't work and you had to be able to figure it out manually. It's gotten much worse since then; cashiers give me weird looks if I give them a little extra so I can get back an easier-to-manage amount of change. I've heard that they're even giving kids calculators in elementary school now. What's the point?