I'm writing about cultural differences - not for scientific purposes - and am trying to find out about more and less formal ways of saying goodbye in English.
- On a scale of formality (from least to most formal), where would you put "goodbye", "bye-bye", "bye", "take care" and "cheers"?
- What would you use in a formal context (e.g. business meeting with 'important' people in the company/decision-makers, etc.)?
I'm mostly interested in answers relating to American and British English, but any other varieties are welcome as well.