answer: The teacher let #Person1# ask Jack which circus tickets he's decided to buy for the class. Jack says he would buy the expensive ones and explains why.
documents: #Person1#: Jack, our teacher let me ask you which circus tickets you've decided to buy.
  #Person2#: Well, there wasn't much choice of them. There weren't enough of the 12 pounds 50 seats for all of us, which is what I was planning to buy. And although there were lots of seats at 15 pounds 50, these were only on weekday afternoons, which I know wasn't suitable for us. So I'm afraid I've gone for the ones at 17 pounds 50. I know it's more than we wanted to pay. But at least we won't be right the back.
  #Person1#: OK.