Need cat litter but don’t have a coupon for it? You can still save money by redeeming rebate offers! Right now, buy a 15.4-pound box of Fresh Step Lightweight Extreme Litter for $10.99 at Petsmart (regularly $12.99). Pay full price at the register and later submit your receipt for a $2.00 MobiSave rebate offer. Final price: $8.99!