A: I've never seen a machine like this before and need some help. B: Sure, no problem. What are you trying to get? A: I want to buy a drink. B: OK. This machine needs you to use that change machine first to get correct change. A: I've got the correct change already. B: First you put your money in the dollar slot or the coin slot. The dollars have to be smooth. A: OK, what next? B: Just know that sometimes the money doesn't go in perfectly the first time and you have to try again. A: OK, next? B: Choose what you want and push the button. Sometimes it takes a couple of tries. A: I agree with you. B: Hope that works for you!