They know how much to charge you at the till, therefore they know what price to put on the label. It is that simple.
For webstores, require customer to disclose location so the right price can be computed; they have to do that when it comes to the billing page so it isn't novel work.
Everything else is bullshit reasoning to get away with false pricing/false advertising.
Taxes change every few months? Anyways, yes, I expect them to reprint them if the price changes as well, which actually is liable to happen somewhat often. If you’re worried about paper waste, they make lcd labels too, which can be reprogrammed on the fly, so you can’t even make the “reprint” argument. It’s really and truly not an unsolved problem.
That doesn't sound very economically conservative or environmentally friendly. I (and many other conservative HN readers) would probably not shop if stores were to do this.
For webstores, require customer to disclose location so the right price can be computed; they have to do that when it comes to the billing page so it isn't novel work.
Everything else is bullshit reasoning to get away with false pricing/false advertising.