excuse me , could you tell me which line I ’ m supposed to stand in to buy bubble wrap and to post a package ?   you can buy the bubble wrap here , but you ’ ll have to stand in line over here to post your passage .   that ’ s a really long line . How long do you think it ’ ll take to get through all those people ?   it takes about 3 minutes per person , so it ’ ll probably be about an hour ’ s wait .   can I buy stamps here ?   sure . How many would you like ?   I need 30 for my Christmas cards .   are you sending them abroad ? 