The context of the following conversation is Jan went to the store to buy some milk for her cereal to eat in the mornings.:
Jan says I just got done with a huge grocery store trip..
The friend responds What are all those bags filled with? They look heavy..
Jan responds It's all milk!.
The friend responds Why would you buy so much milk?.
Jan responds I eat a ton of cereal every morning. This will only last me a few days, believe it or not..