Right now Amazon has Seventh Generation Dishwasher Free & Clear Pacs, 20 pk  for only $4.05.  Here is what you will need to do:

$4.05 Seventh Generation Dishwasher Free & Clear Pacs, 20 pk
5% off by clicking Subscribe Now
10% off Coupon
Net Price: $4.05

Free shipping is included with the subscribe and save membership and can be canceled at any time.

This will ship for Free with Super Saver Shipping with orders of $25 or more. You can upgrade your membership to Amazon Prime and get Free 2-Day Shipping.

Disclaimer: This post contains a link to an affiliate. See my Disclaimer Policy for additional information. Prices are subject to change without notice from Amazon.com so please verify the purchase amount before you order.