求一道英语短文题目答案.

求一道英语短文题目答案.
Barbican Theatre
May 29～June 2
A Dream Play
Evenings at 7：15 pm（May 29 at 7 pm）
Tickets
Weekdays：￡27 ￡20 ￡16
Sat：￡29 ￡23 ￡17
Barbican Theatre
June 17（not June l0,1l,12,15）
Swan Lake June 6,7,8,9,16 at 7：45 pm；June l7 at 5 pm
Triple Bill June l3,14 at 7：45 pm
Tickets
Weekdays：￡24 ￡19 ￡l5
Sat／Sun：￡26 ￡21 ￡17
Barbican Card Discount（折扣）
First night tickets for～￡l 2 each
Other pel4brmanees：20％off 2 tickets
提问：If you want to buy three tickets for Triple Bill on Tuesday,how much will you pay at least?
　　A．￡45． B．￡51． C．￡57． D．￡60．