Mom's Carrot Cake

2 cups flour
2 tsp. soda
1 tsp. salt
2 cups sugar
2 tsp. cinnamon
1 cup oil
3 to 4 cups raw grated carrots
4 eggs

Mix and bake in greased pan at 350 degrees for 30 minutes; if you put it in a cookie sheet pan bake for only 20 minutes.

Frosting:
1 pkg. cream cheese
1 box powdered sugar
1 cup margarine
1 tsp. vanilla