2. Where to Buy What

A: Do you want to come with me to Walmart?

B: What do you need to buy?

A: I'm out of groceries.

B: Groceries are expensive at Walmart!

A: You really think so?

B: Yes! You should buy groceries at the market.

A: I also need some new blankets.

B: Well, you'd buy that at Walmart.

A: If Walmart sells both, why go to different stores?

B: You'll save money if you do.

A: Why will I save money by going to different stores?

B: Stores have different prices for different things.