Easy Fruit Crisp Dump Cake

1 can (21 oz) cherry pie filling (or whatever flavor)

1 can (8 oz) crushed pineapple, undrained
1 pkg yellow cake mix
½ cup margarine, melted
Heat oven to 350. Spread pie filling and pineapple in ungreased 9 x 13 pan. Stir together cake mix (dry) and margarine in large bowl until crumbly. Sprinkle evenly over fruit. Bake 35-40 minutes or until light brown. Serve warm or cool.