Flashy store signs, the size of carts, and even where you find the eggs and milk all contribute to getting customers to spend more. Sale signs at the entranceFlashy sale signs not only draw you in, but they also create what's called positive pricing, according to Edward Fox, professor of marketing at SMU Cox School of Business. People who prefer to buy items on sale will buy more when a product is on sale, which works to the retailer's advantage, said Fox. Enticing endcap displaysEndcap displays with seasonal or sale items are meant to distract you. And read the fine print on sale signs.

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