Wait, for real? Do they normally just give you a general cost and not specifying what makes it up? Non-american here

Oh it gets more fun, because if you have to go by ambulance like I did, you get a bill from the ambulance company. The one I had tried to quadruple charge me and had to be told multiple times that the bill was paid, they can't keep making up new charges because "we forgot one thing" or "rates changed".

Luckily it was all worker's compensation, so I didn't pay a cent, but it was a rather interesting 6 months.