Thumb Score: +24

Amazon [amazon.com] has 51.5-Oz Dawn Ultra Original Dish Soap Refill Jug (Original) 3 for $20.61 – 20% (multibuy discount) – 5% when you check out via Subscribe & Save = $15.46.
Shipping is free with Prime or on $35+ orders.

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