Originally, Andy and Bill had the same salary, which was $$\textbackslash$6000$$ per month. Recently, Andy gets a promotion and his salary is $$150\textbackslash\%$$ of the original salary. On the other hand, Bill made a mistake at work. Now, His salary is $$90\textbackslash\%$$ of the original salary.What is the difference between Andy\textquotesingle s and Bill\textquotesingle s monthly salary now? 
选项为:A:$$\textbackslash$2667$$  B:$$\textbackslash$3600$$  C:$$\textbackslash$6000$$  D:$$\textbackslash$14400$$  请回答其中一个选项.