Thumb Score: +23

Amazon [amazon.com] has 12-Pack 12-Oz Pepsi Zero Sugar Cola Soda 3 for $20.91 – $5.82 (multibuy discount) – 5% when you check out via Subscribe & Save = $14.04.
Shipping is free with Prime or on $35+ orders.

Target [target.com] has for Target Circle Members (free to join [target.com]) 12-Pack 12-Oz Pepsi Zero Sugar Soda at 3 for $25.17 – $10.07 (Buy 3, save 40% discount) = $15.10. Select free store pickup where available.