Kmart offers this Ultra Plus Powder Laundry Detergent 180-Load Box (17.3 lbs.) for $9.99 ($0.06 per load). Choose in-store pickup to dodge the $17.62 shipping charge. That's $14 off list price and tied with our October mention as the best deal we've seen. This detergent is rated for high-efficiency use in all washer types.
Of note, Shop Your Way Rewards members will earn a Kmart credit with this purchase and may be eligible for additional credits and discounts.