Question: Milo goes into his local supermarket to buy some food for a banquet his is planning on the weekend. He needs 10 cans of tomato soup for the sauce he is making. He loads up his trolley and heads to the self-service checkout. When he gets to the checkout, he can only scan three cans through before the register. Milo is frustrated as he accepted the offer to sell the soup, or so he thinks. Can you advise Milo what has happened from a contractual view?