王先生（Mr.Wang）要买一件白衬衣，但现在没有，最后他买了一件蓝色的，共花了
138元。请根据提示编一个售货员 (A) 和王先生 (B) 的对话。以下提示语仅供参考
① Can I help you / What can I do for you?  
② I am looking for...
③ What color do you like?              
④ Do you have any other color ones?
⑤ How about / What about…?            
⑥ How much…?
⑦ I'll take it.
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