Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 乔治买了24张票，每张票7美元。因为购买了这么多，他享受了50%的折扣。他在票上花了多少美元？


### Response:
 乔治花了24张票 × 每张票7美元 = 总共168美元。
应用折扣后，乔治花了168美元 × 50% = 84美元。