Cool Yogurt and Fruit Pie

Ingredients

• 1 cup cereal, finely crushed (any kind)
• 14 cup pecans, finely chopped
• 3 tablespoons margarine or 3 tablespoons butter, melted
• 1 14 cups pretzels, finely crushed
• 14 cup sugar
• 12 cup butter, melted
• 1 reduced fat graham cracker crust
• 12 cup fresh fruit or 12 cup frozen fruit
• 2 (6 ounce) containers yogurt, low-fat sweetened to match the fruit (for example, blueberry yogurt with blueberries)
• 1 (8 ounce) container whipped topping, low-fat frozen and thawed