Read the dialogue and answer the question. P: Excuse me, would you please give me some information? S: Certainly, what can I do for you? P: There are 50 people in our group. We come from Singapore. Do you have any group ticket? How about the discount? S: Yes, we have the group ticket. According to the Ticket Policy, the group above 50 persons has 10 percent discount. Please contact with the station supervisors, they will be at your service. P: How much is the fare to South Gate Station? S: 4 Yuan for one ticket. Question:How much should they pay totally?