What did you have left in your inventory at the end of the game?

[MercenaryForHire]

Barring the "You need this to complete the game" items, I had:

13 batteries (I abuse the glowstick and night-vision horribly)
12 flares (What exactly are these good for?)
2 bottles of painkillers (I took a beating getting back to the exam room)
And of course, the ever-useful Flat Coin.

I didn't even realize the machine would take the coin until my second playthrough - I just figured it being flattened made it useless, and smacked the machine with a rock.