Consumer arithmetic

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Across
  1. 3. The price at which an item is sold.
  2. 6. The operation in mathematics used to calculate a profit or a loss.
Down
  1. 1. A gain from selling an item.
  2. 2. The price at which an item is bought.
  3. 4. The difference when cost price is greater than selling.
  4. 5. What you buy or sell is called an _ _ _ _.