There is a great deal on Amazon.com right now. Kraft Blue Box Macaroni and Cheese (Pack of 15) for only 11.49. That's only .76 cents a box.
My kids go through mac and cheese like crazy! I pay about 1.38 a box or 5.00 for a 5 pack in stores.
When you click on the link it will show that the price is 29.92 but on the right hand side you will see "More Buying Choices" make sure you add the Amazon.com price to your cart. Plus it's eligible for free prime shipping.