Here is how you are going to have to work this deal. You will need to purchase 3 of the 12 packs from coke and you will use your ECB card at checkout to get $5 bucks off.
Buy (3) Coke Product 12-Packs Only $1.33 (Sprite, Diet, Regular, Zero)
Get $5.00 in ECB
$4.00 or $1.33 each after ECB