On Amazon right now you can get Cascade ActionPacs Dishwasher Detergent, Fresh Scent, 85-Count for only $13.69! First clip the $1 off coupon below the item price and then choose the Subscribe & Save option. This will also give you free shipping. This works out to just $0.16 per pac!
Note: Amazon prices and promotions can change at any time. The price(s) listed in this post is/are subject to change.