You took it to Midas?? Yeah, you got screwed, bad. I'm not sure what kind of car you have, but the brakes themselves shouldn't have been more then $250-300 tops, including parts. When I had the front brakes on my Lexus done a few weeks ago, it was $385 including pads, rotors
and calipers (calipers were seizing) along with the labor. The calipers were more expensive than the labor. If they had not needed replaced, it would have been just $189 for the brake job. I'd be interested in looking up the parts for your car at an auto parts store and finding out just how much they marked them up.
I laughed at "shop supplies charge." What the forget is that? If the shop doesn't have the supplies to fix your car that's their own fault, they shouldn't charge you for their incompetency.
The shop supplies charge is to cover the cost of miscellaneous fluids and parts they use that aren't included in the normal charges along with the environmental fee, which pretty much every mechanic I've been to has.