Is 24.01 the Correct Answer for the Static Friction Problem?

[Bacheeseafg]

http://imgur.com/bayjp I just need some clarification, the answer I got was 24.01, because the box is not moving, meaning a = 0, therefore 0 = Fa - Ff, I know Ff = (Mew x Fn), Mew = 0.245 and Fn = 98N, (I did 1 FBD of the sum of all masses). Meaning 0 = Fa - (0.245 x 98) and I just rearranged the question to get my answer.

 

[Simon Bridge]

What did your free body diagram look like?
(Arn't there two friction forces?)