3. Coin

Fun fact of my working life: if you use the shiny dollars on the right, the vending machine will reject it. To have, say, a chocolate bar, you need to use the old loonies (1$), the new ones just don't work. So there is a big exchange market in the break room.

Finished my first week! We were thrown out of the room for about an hour, while they cleaned it, which was just perfect because I was already on my lunch break!