Costco In-Warehouse Only: 24-Ct 12oz. Kirkland Signature Sparkling Energy Drink $13 (Pricing/Availability May Vary)

Costco [costco.com] has *Kirkland Signature Sparkling Energy Drink, Variety Pack, 12 fl oz, 24-count* on sale for $4 off *until 9/20*. That should be *$12.99* in warehouse (it's more expensive...