3 Bean Casserole

1 med onion
1 lb bacon
1 16 oz can lima beans
1/3 C. brown sugar
1/3 C. ketchup
1 lb. hamburger
1 16 oz. can butter beans
2 16 oz. cans pork and beans
1/4 C. white sugar

Brown onion in margarine.  Brown and drain hamburger and bacon.  Combine all the ingredients.  Serve warm.