Welcome to the zoo Opening time:                                     Price: From Monday to Friday                             Adults:Y=20 8:30 a.m.--5:30 p.m.                              Childen:Y=10 On Saturday & Sunday 8:30 a.m.--6:00 p.m. Location:Xiaohe Street, ChangchunDistrict ,Binhai City . Beibei is 11 years old,and this Sunday she wants to visit the zoo with her parents.How much should they pay for the tickets?
Y=20. Y=30. Y=40. Y=50.