3 Complete the sentences with the words in the box. change cost earn pay sell spend 1 You earn money for work you do. 2 How much did those cool trainers __________? 3 Can we __________ for our drinks with euros on the plane? 4 Supermarkets __________ many different things to their customers. 5 Where can I __________ my Brazilian reals into pounds? 6 Don't __________ all your birthday money on video games and sweets!