[ychnd]

You are much faster than a professional cashier? Congrats I guess. Also the space argument doesn't hold up. The cash register belts are not need on staffed registers if they are not needed on customer slaving ones. So they are approximately the same size minus the chair for one helpful human.

[mrd3v0]

Not because of anything impressive other than the fact that most professional cashiers I have interacted with are not skilled enough to be as fast you imply because it is a high turnover job. The space argument depends on the fact that all customers are checking out simultaneously, not waiting in a queue.