So, it is not a simple decision of where the store manager thinks they should be.
Secondly, it was a law at one time in my state where if you advertised a product for one price, and charged a different amount that was greater than the advertised price, the store had to refund double the difference. Then again, no one EVER complains about when something is advertised to sell at $6.00, and they get it for $1.50. And I rarely every see people willing to reach into their pocket and pay the full $6.00 because that’s what the product was advertised to sell at.
If you are going to complain about someone luring you into paying more, you should then put your money where your mouth is, and pay the full amount advertised even when you are being charged less.