Let me ask you: would you rather buy something that gives you 50% MORE for the regular price, or buy the regular quantity at 50% off?

According to a new study in the "Journal of Marketing", your inability to solve that "simple" math problem will lead to you overpaying for groceries.

In their study, 7 out of 10 chose the first option, and would buy the product that offered 50% more. But that's the option that'll have you paying more.

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