Buttermilk Biscuits

1 pkg. dry yeast
½ C. warm water
5 C. Flour
¼ C. Sugar
1 tsp. Salt
1 tsp. Baking Soda
2 Tbsp. Baking Powder
1 C. Shortening
2 C. Buttermilk

Dissolve yeast in water. Combine dry ingredients. Cut shortening into dry ingredients.  Add buttermilk and yeast mixture into shortening mixture. Knead, then roll out ½ inch thick  and cut into biscuits. Put onto lightly greased pan. Bake at 400 for 12-15 minutes.