> “it is virtually impossible for a retailer to match shelf pricing and scanned pricing 100% of the time for all items. Perfection in this regard is neither plausible nor expected under the law.”

I don’t knnow about 'expected', but 'not plausible' is up to the company to get their shit together. My spouse works in retail - nobody has time on the shop floor to change label prices all day. Some prices change by a few cents, and then a week later, they change again. If annyone complains, they get the scan-at-the-register price, and then the particular area in question gets a very quick emergency team sent in to re-do all the physical tags.