I suspected that you eat at the school canteen. Good question about the budget of the school - I am wondering too.

The toilet paper can cost 4.90, I am saying that if you look at the price tags, you can find a cheaper one and with no smell (the aroma is a bonus), which can get you to your goal, if you are consuming it with a vengeance, of course. ;-)

On the receipt it is probably written with the trademark, and not as "toilet paper".

Well, oat bran with yogurt, does it count?