Expired sales labels led to overcharges on more than 150 grocery items, according to an investigation led by Consumer Reports and others.

Shoppers at one of the nation’s largest grocery chains may be unknowingly paying more for groceries. An in-depth investigation by Consumer Reports and two news organizations found that customers were often charged higher prices at checkout than what was listed on store shelves.

So it makes sense that when a good deal is advertised and groceries are on sale – that’s the time to buy, right? Well, a new investigation by Consumer Reports found that the grocery chain Kroger, which has a big Texas footprint, was advertising sale prices – but charging full price at checkout.