Kmart offers this Ultra Plus Powder Laundry Detergent 180-Load Box (17.3 lbs.) for $7.99 ($0.04 per load). Choose in-store pickup to dodge the $17.62 shipping charge. That's $2 under last May's mention, $16 off, and the best price 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.