YMMV, Addon Item – Purina Yesterday’s News Unscented Cat Litter, 5lb Bags (Pack of 6) – $3.49 – 1-2month Ship

Description says "Six (6) 5-Pound bags of Yesterday’s News, Non-Clumping, Unscented Cat Litter" and the shipping weight checks out so if you don’t mind the wait this is as cheap as it gets.
Link : https://smile.amazon.com/dp/B003J…redirect=1