I don't know if this will help, but I recently, about 2 weeks ago, had to get some repairs to my MO. A bicycle rack fell off the wall in my garage and landed the bicycle on the hood, causing a few deep scratches, a couple of small dings, quarter size. There were a couple of scratches on the bumper, too. The estimate to repaint the bumper and hood, repair the dings, and replace the grill, don't know why, didn't see any damage there, was $1100 and some change. We are only talking some paint and time and a grill. (I have the old grill, they gave it back to me.)
So, I guess what I am saying is, you are right, $2400 doesn't really seem enough to cover all that labor, paint and parts replaced.
I agree with the others, get several estimates.
Good luck.