Key Lime Cake & Icing

Cake:
1 box lemon mix
6 oz. box lime jello
3/4 cup orange juice
mix all together until smooth
5 eggs- add eggs to mixture 1 at a time and beat after each one.
1 1/2 cup oil- mix thoroughly
Bake at 350 for 20-30 minutes and let cool
Icing:
1/2 cup margarine
8 oz. pkg. cream cheese
1 box confectioner sugar
mix all together thoroughly. may add pecans or coconut. spread over cooled cake.