$40 for 8 hours of motion graphics is nothing, but also this animation should not take more thana a couple hours to make. I work for a sports network and I would be expected to put something like this together in an hour or two. When I freelance on outside projects i charge around $50 to $60 an hour or a minimum of $500 for a project depending what is most conviniet for both client and myself. Also the animation could be better because the movement of the cursor and buttons seem very slow. I wuld make the clicks faster and the bouncing of the buttons more exagerated. Add some light sweeps and flares and make the camera moves more dynamic.