For the restaurant question, I said to accept because as long as
variable costs are covered, it's a good deal. I also assumed the labor
was fixed in this case because the question stated they (the laborers)
were there every day as if they were a daily necessity to run the
business. In most cases labor is variable, but I think in this
question he meant for it to be fixed. Maybe he wanted to trick us a
little and the labor was variable - I'm not quite sure. Like Ana said,
I'm hoping that he'll give some credit if we at least proved we knew
the material/terminology.
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