You'll need 2 ads to do this deal. The HyVee ad AND the Sunshine ad. (The HyVee ad can be found in the store or in the shopping news; The Sunshine ad can be found in today's paper or sometimes in their store (call ahead).
Go to HyVee:
Buy four 12 packs of Pepsi Products
Use the 4/$10 HyVee store coupon from the front of the HyVee ad
Use the $2/4 manufacturer's coupon from the Sunshine ad
Total: $8 for 4 12-packs or $2 per 12-pack