George John in WCCO | CBS Minnesota

If you walk into any Target or Walmart, you might see paper towels on sale one day, toothpaste the next and laundry detergent after that.

So, how do stores decide what’s on sale?

“It’s a bit counterintuitive,” said George John, professor at the University of Minnesota’s Carlson School of Management. “In a modern economy like ours, most stuff goes on sale when the sales volume is high.”

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