> I'm not sure any of the large US stores I shop in have a price tag on the item any longer.

But it’s in the shelf surely? Probably on an e-ink display.

But what good does that do at the checkout if computer systems are down? And no supermarket I frequent has eink displays on the aisles.

Besides which the central shelf label server is probably also down.

And do you expect the cashier to walk to the shelf for every single item in order to look up prices?