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Order the steps: from marked price to what the customer pays

Exercise and reference answers

Steps
  1. Start from the marked price on the label
  2. Work out the discount as a percentage of that marked price
  3. Subtract it to get the sale price
  4. Apply the tax rate to that sale price
  5. Add the tax to reach the final bill amount

Explanation

Discount first, tax second, because each is taken on a different base. Source: syllabus Maths, Ch 7 Comparing Quantities.
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