"There are between 70,000 and 120,000 items in every store and with thousands of price changes each week, unintentional errors may occur," said King. "And when you find those, please bring those to our attention and you'll be compensated for them."

Kroger's policy only applies to items without a price tag on the package. The store will not give you a refund for alcohol or tobacco.  Randalls' policy applies to everything except alcohol, tobacco and dairy products. We checked with both H-E-B and Walmart, but neither of those stores has a price guarantee policy.