For Prime members only, Amazon offers the Pure Growth Organic Super Chips 3.5-oz. Bag 6-Pack in White Cheddar for $17.40. Clip the 30% off coupon on the product page, and it drops to $12.18. With free shipping, that's $5 off and the lowest price we could find for this quantity. (They run for around $3 per bag at local stores.)
Note that it will ship in 1 to 2 months.