Arm & Hammer laundry detergent 100 load size on clearance fro $4.44 - $1 insert coupon = $3.44 per 100 load bottle (they are huge!)
Some other good clearances as well, like $0.54 Kraft Dinner - some kind that is getting discontinued and 4 pack energy drinks for $1.48 (I don't drink them, but seems like a good deal).