Peanut Butter Cookies

1/2 cup white sugar
1/2 cup brown sugar
1/2 cup peanut butter
1/2 cup margene (margarine)
1 egg
1 tsp baking soda mixed with 1 1/2 cups flour
pinch of salt
drop by spoonfuls, press with fork, bake for 10-12 minutes in 350 oven