Present Simple or Continuous?

Ann sees Paul putting on his coat and says: Where you (go), Paul? 

Paul: I (go) to buy some cigarettes. You (want) an evening paper?

Ann: No, thanks. You always (buy) cigarettes, Paul. How many you (smoke) a day?

Paul: I smoke perhaps 20. Jack (smoke) far more than I (do). He (spend) $ 10 a week on cigarettes.