A pub owner buys four boxes of wine; then, he empties all the wine in a barrel, and then he adds two jugs of water. Finally, he sells all the wine for £1.50 a glass.

How much money did he earn?

Ask your teacher questions to find out all the data that you need before you can answer the question.
Solve the problem
(Images source: https://openclipart.org)

JJCC