给下列句子排序，只写序号。
1. OK, I’ll take it.
2. How much is it?
3. Can I help you?
4. What size?
5. It’s ninety yuan.
6. Size 6.
7. Yes, please. I want a pair of shoes.
________________________________________
【答案】3746251
【解析】
题目：给下列句子排序，只写序号。
关键字：