Grapefruit Cake

1 cup flour
1 tsp. soda
1/2 tsp. salt
1 cup sugar
1/2 cup shortening
Juice of 1/2 a grapefruit
2 eggs

Bake at 350°F until inserted toothpick comes out clean.

Topping:

Juice from 1 ½ grapefruits and 1 cup sugar.