Combine cake mix, fruit cocktail with syrup, 1 cup coconut and eggs in lge. Mixer bowl. Blend, then beat at med. Speed for 2 min. Pour into prepared 13 x 9 x 2 sheet cake pan. Sprinkle with brn. Sugar. Bake at 325 F. for 45 min. Or until cake springs back when lightly touched. Bring butter, granulated sugar and milk to boil in saucepan. Boil 2 min. Remove from heat, stir in remaining coconut. Spoon over hot cake in pan.