Amazon has got this right now at $11.97.
Checkout via Subscribe & Save for a total of $11.37 w/free shipping.
– If you have 5 or more Subscribe & Save orders, your total will be $10.17 shipped.
— Remember: When checking out with Subscribe and Save, you aren’t under any obligation to continue your subscription, and may cancel at anytime. Amazon will also not ship any future shipments without first sending you an email giving you ample time to cancel if you so choose. Subscribe & Save can be cancelled via the manage your subscriptions page.