Thumb Score: +14

Amazon [amazon.com] has 4-Pk 30-Ct Ziploc Gallon Food Storage Bags for $15.10 – 30% when you ‘clip’ the coupon on product page – 5% when you check out via Subscribe & Save = $9.81.
Shipping is free with Prime or on $35+ orders.

Price
$5.29 lower (35% savings) than the one-time price of $15.10
$19.12 lower (66% savings) than the previous price of $28.93