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 $38.84 when you add them to your cart at Jet.com. Shipping is free on orders over $35. That brings the price to less than $0.81 per bar, which is the lowest price we can find anywhere. Clif energy bars are a source of fiber and protein, and you can choose from more than a dozen flavors. Sales tax is charged in most states. Editor's Note: My personal favorites are the pictured Cool Mint Chocolate (which has caffeine) and Chocolate Brownie.