Lightly grease a 9 x 13-inch pan or dish and spread the undrained crushed pineapple over the bottom of the pan add the layer of blueberries and 34 cup of sugar
Sprinkle the box of cake mix on top of the fruit mixture
Then pour the melted margarine evenly over the layer of cake mix top with a generous amount of pecans
Finally for a crunch glaze sprinkle the 14 cup of sugar on top
Bake at 350 for 35 to 40 minutes
After cake has cooked 25 minutes cut down through the cake with a spoon to permit juices to come up