Amazon has the 4-Pack 40oz Jif Creamy Peanut Butter for $24 - 20% off (check “Save an extra” box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $18 with free shipping on $35+ or with Prime (extra 5% off for 5+ S&S orders). Roughly $4.49 per jar vs. $6.78 at Walmart. Around 11 cents per ounce.