Mammie's brown sugar cookies

MAMMIE?S BROWN SUGAR COOKIES

1 c. brown sugar, packed
1 c. sugar
2 t. vanilla
½ c. margarine
½ c. shortening
3 eggs
1 t. soda
3 ½ - 4 c. flour

Beat eggs well. Add sugar and mix. Add other ingredients. Mold into long round loaf (or loaves) and store in refrigerator. Slice as desired and bake at 400* F. for 5+ minutes depending on how thick the slices are.