Check out Green Works Facebook page HERE. "Like" them and you will be able to print a $3 off laundry detergent coupon when you hit the "Coupons" tab.
Greenworks Laundry Detergent 90 oz 60 Load $12.99 (Price Cut Until 5/8)
Use the $3/1 Target store coupon from here
Plus, stack with the $3/1 coupon from above
Final cost: $6.99!