Response:  1. Whole wheat bun - 300 calories
  2. Beef patty - 250 calories
  3. Cheese - 100 calories
  4. Tomato - 20 calories
  5. Lettuce - 5 calories
  6. Mustard - 10 calories
  7. Ketchup - 15 calories
  
  Total calories: 700 calories