The third part is a consumables payment of £5 per month, which is used to buy stuff that everyone in the house uses, like washing up liquid and cleaning stuff, and this also needs to be paid at the same time as the rent. I pay this money directly to the consumables money account holder, who is one of the sharers, at the start of each month, and I don't have anything to do with the money after this. You and the other sharers decide what you would like to spend the money on.