Preheat oven to 350 degrees. Cook macaroni in boiling water until tender. Remove from heat. Combine cheese sauce with cooked macaroni. Pour into 1-1/2 quart casserole; top with 1/2 cup shredded cheese and 1/4 cup finely chopped bread crumbs. Bake for 30 minutes or until bubbly and cheese is lightly browned.