Add Yahoo as a preferred source to see more of our stories on Google. slobo / Getty Images Have you ever questioned the seemingly random prices at your local Costco? Item prices shift by a few cents ...

Ever noticed those tiny numbers and symbols on Costco price tags and wondered what they actually mean? Those cryptic codes aren't random. They're telling you exactly when to buy, when to wait, and ...

At Costco, the slightest difference could mean hundreds of dollars in savings. Have you ever questioned the seemingly random prices at your local Costco? Item prices shift by a few cents each week, ...