12-Pack 12-Fl-Oz Diet Pepsi Cola Soda: 3 for $14.35

Amazon: 3 for $23.91 - $9.56 Multibuy Discount (Buy 3, save 40%) = 3 for $14.35

Select Target Stores: 3 for $25.17 when you add quantity of 3 to cart - $10.07 multibuy discount (Buy 3, save 40% on select soda) = 3 for $15.1: Select free store pickup where stock permits.