White Almond Wedding Cake -- 1 (18.25 oz.) pkg white cake mix; 1 cup all-purpose flour; 1 cup white sugar; 3/4 teaspoon salt; 1 1/3 cups water; 1 cup sour cream; 2 tablespoons vegetable oil; 1 teaspoon almond extract; 1 teaspoon vanilla extract; 4 egg whites