There is a money box in the fridge, put the amount for the item you want to buy. This is also where you put your access payments/donations.
If you want a particular flavour of soft drink in the fridge, the easiest way is to buy a box yourself, bring them in with the receipt and see a committee member to get refunded. Please try to get a good price, and don't buy too many if it's not likely to be a popular flavour. Our pricing is based on each can being less than $1, and the lower it is the more money it raises for MHV. Chips we've had two prices - 50c for the cheaper ones and $1 for the fancy ones.