F: Sir, the black coffee costs $5. But if you buy this sandwich of $6.00, you can get a black coffee free of charge. ,M: Then I will surely go for the sandwich.
(A) F: A cup of black coffee and a sandwich are 7 dollars in total. Do you pay in cash or credit card? (B) F: The sandwich is 6 dollars more expensive than the black coffee. It's better if you have that coffee alone. (C) F: Then it's 6 dollars in total, Sir. (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?
C