Kmart offers this Ultra Plus Powder Laundry Detergent 180-Load Box
(17.3 lbs.), model no. SEA 9879, for $9.99
. Plus, Shop Your Way Max members bag free shipping. (Not a member? It's free to sign up for a 90-day trial
; otherwise, shipping adds $17.62. In-store pickup is also available.) That's $0.06/load and tied with our May mention as the lowest total price we could find. This detergent is rated for high efficiency use in all washer types.