Shaw's Supermarket :

Barilla Pasta $1 a box excluding the type in the yellow box.

Use the coupons in Coupons.com (75c off 2) - also Shaw's doubles the value.
So $1 x 2 - $1.50 cpn = 50c for 2 boxes.

Print Coupon Now

In addition, if you need more than 4 boxes (2 coupons), here is the deal:

After buying the first round, a Catalina will print with $1.50 off 3, thus making them 50c a piece and a fresh Catalina will print after each purchase.