The country's largest drugstore chain, Walgreens, has been accused of overcharging customers.
The lawsuit filed by Missouri's attorney general alleged that “Walgreens has consistently and systematically displayed inaccurate sales tags, overcharged customers and used misleading or confusing in-store signs.”
It's not the first time Walgreen Co. has faced charges of inaccurate pricing. Earlier this year, the retailer settled suits with California and Wisconsin without admitting wrongdoing.
“This level of consumer deception is inexcusable from a corporation as sophisticated as Walgreens,” said Chris Koster, Missouri’s attorney general.
Investigators found that one of every five items in their Walgreen's shopping basket rang up higher than advertised.
For example, according to the lawsuit, Muscle Milk advertised for $6.99, rang up at $8.99. Lipton Tea marked $1.89 actually cost double that. And Oreo cookies on sale at two for $6 were not a deal at the register. Shoppers paid $4.19 for a single package.
Walgreen's declined to comment on the lawsuit, but told ABC News: “We were disappointed and disagree with the attorney general's comments. However, we are prepared to address any appropriate concerns.”