Hmmmm....let's see.
Food: A five pound bag of Purina One twice a month. About 60 cans of Fancy Feast Elegant Medleys (mostly) once a month.
Litter: 2 -16 pound jugs per month.
Treats: One large pouch of Temptations twice a month.
Toys: Assorted bags, boxes (free), Q-Tips, bottle caps, toy mice. track with ball in it, and of course, the other cat. As needed.
Bedding: They each have a bed that they actually use, some of the time. When they are not in their bed, they can be found on the floor, the couch, my bed, or on top of the refrigerator (Mac).