Mix sugar, flour, egg, baking soda, and salt together until blended.( I always mix my dry ingredients well before I add the wet. It's a weird taste when you get a mouthful of B. soda!) Add pineapple with its juice,and coconut. Mix well. Pour into a lightly greased 9 x 13" pan.
Bake @ 350 F degrees for 30 minutes.
Cool and spread on the Cream cheese frosting.