cheese

E:  My favourite [kind of cheese] is melba.

Me:  What kind?

E:  Melba [he means Marble].  Do you know what you could do, what would be cheaper?  Would be to get some white cheese, and some orange cheese, and mix them together in a bowl.  That would be cheaper.  How many kinds of cheese are there?

Me:  I think there's about 2,000.

E:  How do you know the exact number?

Me:  I don't really, I'm just guessing.

E:  I think there's about 16.