Mandarin Orange Upside Down Cake

1 stick butter
1 cup brown sugar
1 can 11 ounce mandarin oranges
1/2 cup coconut
1 package yellow cake mix
3/4 cup chopped nuts

Preheat oven to 350 degrees. Heat butter in rectangular 9"x13" pan, until melted. Sprinkle brown sugar in pa n and then arrange orange slices. Sprinkle the sugar and oranges with coconut. Prepare cake mix as directed, stirring in chopped pecans. Pour into pan and bake 45 to 55 minutes. Take out of oven and immediate turn over.