It could have an effect on the owner in the current US job market though — clerks may no longer be willing to do crazy checkout item shuffling for minimum wage and decide to quit. Then the store owner has to choose what's in their best interest: add price tags to items so minimum-wage workers won't quit, increase wages to convince the workers to stay, or shutdown the business.
Using malevolent behavior to make someone's job harder so that turnover increases and wage growth causes market effects that induce owners to comply with laws because gov does not enforce their own laws .... God bless America where the exchange of power between consumers and corporations shall not be infringed.
Chain convenience stores and grocery stores will reliably list their prices for each item