Melt margarine in a large saucepan over medium heat. Add sugar; stir well. Add marshmallows; cook until marshmallows melt, stirring constantly. Remove from heat; stir in cereals. Press cereal mixture evenly into the bottom of a 13- x 9- x 2-inch baking pan coated with cooking spray. Let cool for 1 hour. Yield: 18 servings (serving size: 1 [3- x 2-inch] bar). Per serving: 95 Calories; 2g Fat (19% calories from fat); 2g Protein; 20g Carbohydrate; 0mg Cholesterol; 103mg Sodium Recipe by: Cooking Light, Jan/Feb 1993, page 72 Posted to MC-Recipe Digest V1 #392 by igor@digex.net on Jan 28, 1997.