A more polite response, still showing your unwillingness to continue the conversation, could have ended the conversation without offense.
He hands you your mangoes and turns away. You now see that you have damaged the relationship, and this will cause awkward interactions in the future if you decide to return to this stall.
For tips on nonverbal and verbal communication, review section 03 – Cross-cultural Communication: Communication 101.
Most questions of this type come from a place of curiosity, as opposed to animosity or attack, so responding by simply expressing your discomfort will often successfully and politely resolve the situation.
For tips on when to engage or disengage from a conversation, review section 04 – Engage: Get Out There.
Using data can be a good way to defend your position without sharing personal information or engaging in an uncomfortable conversation.
For more data on the United States and its population, review section 02 – Culture: Understanding Your Own Culture.
For more practical tips on how to respond to difficult questions, review section 04 – Engage: Get Out There.
This approach provides context for someone who may be unfamiliar with this aspect of American culture.
For more information on American values, review section 02 – Culture: Understanding Your Own Culture.
Keep in mind though, reinforcing things that can be seen as stereotypical can sometimes result in larger issues in the long term.
For more information on American values, review section 02 – Culture: Understanding Your Own Culture.
Using a rational explanation but still showing affection and concern for your grandmother helps show the shopkeeper your perspective and solution.
For more practical tips on how to respond to difficult questions, review section 04 – Engage: Get Out There.
This approach reinforces an attitude of learning that can be beneficial in many situations.
For more information on cultural awareness, review section 02 Culture: You and Other Cultures.
For information on how your attitude impacts communication, review section 03 – Cross-cultural Communication: Overview.