Sears offers the Ultra Plus Powder Laundry Detergent with Fabric Softener 125-Load Box, model no. SEA 9884, for $7.88. Choose free in-store pickup to doge the $12.97 shipping charge. That's $0.06/load, tied with our mention of a similar box of Ultra detergent from a month ago, and the lowest total price we could find. This detergent is rated for high efficiency use in all washer types and both softens and cleans clothes.