Cost of changing single entry to multiple entry visa?

Question

Can anyone tell me how much it will cost to change a single entry visa to a multiple entry visa for an American? Will it be difficult for me to do this? I have a single entry E-2 visa that is good for a year.

Answer 1

It is usually the difference between the two.

Answer 2

It will cost about $80 U.S.  It's not difficult to do.