On Amazon right now you can get all Mighty Pacs Stainlifter, Super Concentrated Laundry Detergent, 72 Count Tub, FFP (Pack of 2) for just $15.94 when you clip the $2 off coupon. This works out to just $0.11 per Mighty Pac!
This will ship free with Amazon Prime or qualifies for free Super Saver Shipping with a $49 purchase.
Note: Amazon prices and promotions can change at any time. The price(s) listed in this post is/are subject to change.