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Students learn that the unit price is the cost per unit, and to find the unit price, divide the price by the number of units. For example, to find the unit price of 16 ounces of soup that costs $3.20, divide $3.20 by 16 ounces, to get $0.20 per ounce. Students are also asked to determine which of two given items is a "better buy", by finding the unit price of each item, then comparing the unit prices. The item with the smaller unit price is the "better buy".