This 12-Pack of Clif Bars is already on sale for $10.38, but you can get four boxes (a total of 48 bars) for $39.28 when you add them to your cart at Jet.com. Shipping is free on orders over $35. That brings the price to less than $0.84 per bar, which is the lowest price we can find anywhere online. Clif energy bars are a source of fiber and protein. We found the pictured Blueberry Crisp flavor available at this price (other flavors cost a little extra). Note: First time customers can use the code SPRING15 for an extra discount. Sales tax is charged in most states.