Money and shopping

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Across
  1. 3. (two words) you keep your money in this and take it out when you need to
  2. 4. you get this back if you pay more for something than it costs
  3. 5. the amount of money that you pay to buy something
  4. 8. (two words) to return something to the place you bought it from
  5. 9. a piece of paper that proves that you have received goods or money
Down
  1. 1. (two words) give something to someone without asking for payment
  2. 2. (two words) keep money so that you can buy something with it in the future
  3. 6. the place in a shop where you pay for your goods
  4. 7. (two words) a price which is lower than usual