Make your yellow cake mix following the instructions on the bag (5lbs of mix to 5 cups of water per pan)
Pour cake mix into greased sheet pans and level
In a separate bowl, mix oats, white Sugar, cinnamon, flour and softened margarine
With gloves on, hand mix crumble topping
Sprinkle on top of each cake pan
Bake at 350 dgrees for 15-20 minutes
Wash hands before handling food and after handling any raw food, or if any interruptions that may contaminate hands
Use clean and sanitized utensils/equipment while prepping/cooking
Return ingredients to refrigerated storage if preparation is interrupted