A common misconception is that buying the larger package such as the "family size" or "value size" of an item in a grocery store is always the best value. Next time you go grocery shopping, do the math—you may be surprised to find that sometimes the smallest package is the best value. In order to get the most for your money when grocery shopping, it is important to be aware of unit pricing. The unit price is the amount you pay per unit for a particular grocery item—usually calculated as the price you pay per pound or per ounce.

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