On Children's Day． Tom， a junior middle school student， went to Children's Amusement Park with his mother and his 60﹣year﹣old grandparents． According to the price list． They paid         yuan for the tickets．（　　）

The Price of Tickets
Adult（age 60and above）	Adult （age under 60）	Child（age 6﹣17）	Child （age under 6）
￥15	￥20	￥10	Free

A．60B．45C．80