Mix 1/2 cup sugar and 2 tablespoons flour and cinnamon. Add this mixture to apples and mix well. Place in unbaked crust. Cut the margarine into sugar and flour until very crumbly, spread over apples in pie crust. Add raisins and nuts if desired. Place into heavy brown paper bag. Seal with paper clips. Bake 1 hour at 425 degrees. Remove from bag at once and sit on rack to cool