Do I get a breakdown of what went into each item's price on the display sticker?

Because we get that now on most (if not all) grocery stores and retailers. I can see what items in my grocery receipt were charged which of the various local taxes and can dispute them. I've had groceries miss-categorized and considered prepared food which carries a local tax in my area, but they were not prepared foods and should not have been taxed.

Having a full price up front isn't the magical cure a lot of people paint it as.