M: How much is that in total? ,F: $100, but if you have a membership card I can give you a 20% discount. ,M: Great. This is my membership card.
(A) F: The total price after the discount is $80. (B) F: So you should pay me totally $520. (C) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) F: You'll give me $100 in all.
A