Buy and sell

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Across
  1. 3. to give an article back
  2. 8. the activity of going to shops and buying things or ordering them online
  3. 9. the money that you get back when you have paid for something giving more money than the amount it costs
Down
  1. 1. a small piece of plastic, especially one given by a bank or shop, used for buying things or obtaining money
  2. 2. a piece of paper money
  3. 4. a piece of paper or an electronic document that shows that goods or services have been paid for cash
  4. 5. a sum of money that is paid back to you, especially because you paid too much or because you returned goods to a shop
  5. 6. a small flat piece of metal used as money
  6. 7. what you earn by working or selling things, and use to buy things
  7. 8. to give money to pay for goods, services, etc.