Calculate Month in between two columns and Multiply between

ApplicantName || Amt || Date of Opening

Mr. Abc..............||..500....||..1 Jan 2014

1) I have to calculate the total months from 'Date of Opening' to 'Current Date'

I did like this :-

Select ApplicantName,Amt,DateOfOpening,DATEDIFF(month, DateOfOpening, GETDATE()) AS Month from ApplicantInfo

I got this result -

ApplicantName || Amt || Date of Opening|| Months

Mr. Abc.............||..500..||..1 Jan 2014........|| 5

(This works currectly)

2) Now i want to add another extra column for calculation this.

Total Amt = Amt * Months (i.e. 500 * 5)

How I can do this?