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A: What can I do for you?
B: Fill it with regular, please.
A: OK. How much do you need?
B: Fill it up, please.
A: Sure. Wait a moment.
B: Fine. The price of the gas is higher?
A: Yes. The price went up since two days ago.
B: OK. How much should I pay?
A: 10 dollars.
B: Here you are.
A: Thank you.