In Madrid, 5 litres5\text{ litres}5 litres of olive oil costs €28.50€28.50€28.50. In London, 2 litres2\text{ litres}2 litres of the same olive oil costs £10.40£10.40£10.40. The exchange rate is £1=€1.18£1 = €1.18£1=€1.18.
In which city is olive oil better value for money, in Madrid or in London? You must show how you get your answer.
