Topping:

1/4 cup sugar
1/4 cup packed light brown sugar
1/2 cup flour
1/4 cup margarine

Preheat oven to 375 degrees, mix 1 cup sugar, cornstarch, and salt in a large bowl. Add egg and almond extract, mix well. Add peach slices to bowl, toss gently to coat with sugar mixture. Arrange peach slices in pie crust. For topping, combine 1/4 cup sugar, brown sugar, and flour in a small bowl. Cut in margarine using pastry blender or 2 knives, until crumbly. Sprinkle topping over peaches. Bake until golden brown about 30 minutes. Serve pie warm or cold.