Thumb Score: +38

Amazon [amazon.com] has 51.5-oz Dawn Platinum Plus PowerSuds Liquid Dish Soap Refill 3 for $29.97 – 20% (multibuy discount) – 5% when you check out via Subscribe & Save = $22.48.
Shipping is free with Prime or on $35+ orders.

Savings
Save 20% on 3 when you buy 3 (check and activate [amazon.com])