For each medium apple's filling, you will need:
1 tablespoon sugar
1/2 tablespoon all purpose flour
1/4 teaspoon cinnamon

For each medium apple's topping, you will need:
1 1/4 tablespoon flour
1/2 tablepoon brown sugar
pinch of cinnamon
pinch of nutmeg
pinch of salt
1/2 tablespoon butter, melted