You Need Some Money Today and the Only Friend You

You need some money today and the only friend you have that has any is a miser. He agrees to loan you the money you need, if you make payments of $30 a month for the next six months. In keeping with his reputation, he requires that the first payment be paid today. He also charges you 2 percent interest per month. How much total interest is he charging? 

A) $4.50 
B) $3.60 
C) $9.50 
D) $4.68 
E) $8.60