With orders of $25 or more, Amazon offers the Kraft 15-oz. Miracle Whip 4-Pack for $5.98. Clip the 15% off coupon on the product page to cut it to $5.08. With free shipping for Prime members, that's $1.27 per jar and the lowest total price we could find for this quantity by $7. (Non-members must spend $35 to receive free shipping.)
Note: This item is part of Amazon's "Add-on program"; it can only be purchased with an order of $25 or more.