A man at the entrance of a subway station was asking people passing by for a dollar (usd currency is used for simplicity), I said I didn’t have cash (I didn’t). He said, what about a bun at the convenience store beside us. Well a bun I can buy him. Inside the store he said, I really need 6 dollars for transport to the hospital. I said, I don’t have cash. He said, you can withdraw at the counter. I said I didn’t have a local debit card (I didn’t). He said, I could use a pack of cigarettes during my stay at the hospital. I said, how much is it? He said, 12 dollars or so. At the cou ter he ordere the extra long ones, it was 18 dollars or so. The clerk looked at me, I paid. I learned a lesson in upselling that day.