Combine pretzels, 1 tablespoon sugar and margarine. Pat into a 9x13 inch baking dish. Bake at 200ºC or 6 minutes. Set aside to cool. Cream together cream cheese and 1 cup sugar. Fold in Cool Whip. Spread over cooled pretzel layer. Dissolve jello in hot pineapple juice. Stir in strawberries. When jello has slightly thickened, spoon over cream cheese layer. Chill. Randy Rigg