How much should you tip on pizza delivery?

Related questions

1. Why is Domino's logo red and blue?
2. How do I redeem my free pizza from Dominos?
3. Does dominos have free delivery?
4. How early does Domino's deliver?
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6. Can you pay for dominos with Paypal?
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Tags

1. #least
2. #person
3. #takes
4. #normal
5. #assume
6. #minimum
7. #suggests
8. #deliverer
9. #order
10. #following
11. #tipthepizzaguy
12. #excellent
13. #delivery
14. #pizza
15. #service
16. #there
17. #charge
18. #orders