You may be able to find Era Laundry Detergent on closeout over at your local Kroger! If so, just add in a Kroger Digital Coupon for this great scenario:
Purchase one Era Laundry Soap, on sale for $3.24 (regular price is $4.99)
-Use one $2/1 Era Laundry Soap 25 oz+ Kroger Digital Coupon
Final cost: Just $1.24!
Thanks to I Heart Kroger for the tip and picture!