Yeah if you sign a printed receipt that's true. Most POS devices I see now aren't displaying the individual charges anymore by the time the interface gets to the "really charge $X?" screen and the electronic signature screen. You have to wait until the receipt prints out, and then you can complain to the clerk.
The screen-signature POS terminals I've seen almost always have another screen showing a list of purchases being made. The only exception I can remember is very old pharmacies. In newer pharmacies, the list is on the signature screen.
Interesting. Everywhere I've been recently (mostly west coast, I'll admit), the grocery stories have the biggest tally screens. And at the bottom the biggest line is how much you "saved" by shopping there. (Yeah, right.)
