Amazon offers the Great River Organic Milling Corn Meal 5-lb. Bag 4-Pack for $22.40. Add it to your cart via Subscribe & Save and it falls to $20.16 with free shipping. That's $10 under list and the lowest total price we could find.

Of note, cancel Subscribe & Save after your order ships (it's easy to cancel) or you'll be billed for subsequent shipments.