I have heard this before, and I get the sentiment, but a supermarket usually already prices things for the local area. The same company in different location ca

I have heard this before, and I get the sentiment, but a supermarket usually already prices things for the local area. The same company in different location can have different prices for the same exact thing. So companies can already handle localized pricing. They just use it for their advantage and hide the cost of taxes. Other countries handle this fine. It really isn't any more complicated than properly collecting the sale taxes already. Just decide the price of a thing and add the tax then show the final price. You could also, which is something I saw done in Japan, show the Tax Free price so it's easier to compare. But I kind of don't buy that it would actually much harder than any other hard thing supermarkets do to put the full price on a jug of milk or etc.