A. That's acceptableB. here is your billC. this is a miscalculationA: Good morning, sir. Can I help you?B: Yes, I'm leaving today. Can I have my bill settled?A: Of course, sir. May I have your name?B: My name is Peter Brown and my room number is 806.A: Just a second, please. Mr. Brown,【D4】______ . Please check.B: I'm sorry. I suppose there is a mistake indeed. I only stayed here for three nights, not four. A: Just a second, please. I'll check it. ...I am sorry, Mr. Brown,【D5】______ . So the fee in total should be $ 180. B: Now you are right. Could I pay with credit card? A: What kind of card do you have? B: Visa. A: 【D6】______ . ...OK, here is your bill and receipt. Thank you, sir. Hope you have enjoyed your stay at our hotel. B: Certainly I have. Thank you. A: You're welcome. Goodbye.