I would guess that fixing a scratch like that would cost around $600-$800, assuming the shop did a nice job of blending and matched your paint's orange peel well. It could be a tad more even. They usually have to paint a better portion of the side of the car to match the paint (especially if you have a light blue). The corner lens should be like $30 at a junk yard. Don't know about the bumper cover, though.