What is a supplement charge on a menu?

Related questions

1. Is it pre fixe or prix fixe?
2. What is the meaning of Prix?
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4. How do you pronounce prix fixe?
5. How do you pronounce Givenchy?
6. Where in the grocery store is potato gnocchi?
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10. Why is PH pronounced V?

Tags

1. #customer
2. #truffles
3. #supplement
4. #components
5. #price
6. #cover
7. #expensive
8. #addition
9. #produce
10. #costs
11. #advance
12. #menus
13. #popular
14. #these
15. #restaurants
16. #rarer
17. #charge