As low as $8.10 with coupon and 5+ S&S items. 12 pack shells and white cheddar. Clip coupon and choose S&S. Might also work on some other flavors but my kids don't prefer the farm ones so I didn't check if the coupon was valid there. (found on SD). FWIW Amazon has had lots of good S&S deals on Annie's mac lately. Even the family sized boxes.
https://www.amazon.com/gp/product/B0...pc_slickd&th=1