I recently found two suppliers, one bedding, one food. My bedding is $4.50 a bag, and I'm just passed below half full on one bag. (which has been easily a month). I buy 50 lb bag of food for $34, and that too is just passed below half full. So, a weekly guess....$3-4 a week, if that. I was buying those 3.3 lb rat/mouse food at an average of $8-12 a bag, which lasted 4-5 days.