This tactic may seem so blatantly shady that it's hard to believe stores get away with it. Make no mistake, though: It happens. A lot.
Many grocery stores have been caught duping shoppers with this bait-and-switch -- labeling the weight of packaged meats as more than the food actually in the package. Sure, some stores intentionally put the wrong weight on containers, plain and simple. But there are more surreptitious approaches worth watching out for. Factoring the weight of the package into the reported weight of the food is one way. Another is coating meat in ice so that you end up paying a premium few cents more, which can add up over time.