If the law clearly tells you the relation between the displayed price and the billed price, and the business is doing exactly what the law requires, it can't be fraud.

Anyway, you can ditch the first part. If the law requires it, and the business does exactly what the law requires, it's not fraud.

You can't go around demanding that business violate the law, arguing that not doing so is a crime. You can push for it on moral basis, but never on legal basis.