Because it gets sold in those size packs, I'll buy the 30 or 40 roll packs just so I don't have to remember it the next time.why would anyone buy that much TP I figure if I cant get any I will wipe my ass with a towel and wash it or if its to shi**y I will bury it in the woods people freak out over the dumbest things. I will also not run out of food as long as there are wild animals in the woods and fish in the water.