Kraft Original Mac & Cheese as low as 79 cents a box (Amazon Prime)

Amazon has Kraft Original Mac & Cheese for $12.49 for a 15 ct pack and it's Prime eligible.

If you need it later rather than sooner, opt for Subscribe and Save and the price drops to $11.87, making each box just 79 cents.

Even better:  Combine Subscribe and Save with Amazon Mom and the price drops to $9.99 for the 15 pack, making them 67 cents per box.