Which of these transactions do not get counted in GDP--sale of a used piece of furniture, income of a drug dealer, income of your teenage babysitter, daycare services, services of a doctor, a condo built in 2004 resold today, purchase of a brand new iPad Mini, Social Security payments to retired seniors, your services for helping your brother or sister mow his or her lawn, the vegetables you grow in your herb garden for family consumption, etc.? Explain your answer.