Christian stopped surprised to the reaction of Emilio.
"Hmmm... I mean. I'm very hungry. It will take a long time for me to decide what I will buy. Can you go buy some food for me at the cafeteria?"
"But I want my milk... "
"Don't worry - I will provide you with all the milk you could want. What do you think? Free milk in exchange for some food?"
"Hmm... okay. But you have to give me a minimum of 5 liters. Deal?"
"Deal. I will wait for you outside. You don't need to come back here."
Christian put back the bottles and went out of the store.
So... he wants a lot of milk... thought Emilio.