Apple Cinnamon Cake

1 pkg Betty Crocker Supermoist spice cake mix
1 can (21 ounces) apple pie filling
3 eggs
3 Tbls sugar
1 tsp ground cinnamon

Preheat oven to 350 degrees and grease (or lightly spray with cooking spray) bottom only of 13x9-inch pan.
Beat cake mix (dry), pie filling and eggs in large bowl on low speed 2 minutes. Spread half the batter in pan. Mix sugar and cinnamon together and sprinkle half of it on cake batter. Spread remaining batter in pan and sprinkle remaining sugar and cinnamon on top.
Bake for 30 minutes or until cake tests done. Cool. Serve with whipped topping.
High Altitude: (3500-6500 ft) Stir 3 Tbls all-purpose flour into dry cake mix and bake 5 to 10 minutes longer.