Is it true a copy editor costs $15,000 for a 60,000 page book?

I am also not sure whether that is $15,000 USD or CAD.

It might be $18,000 in CAD for a 60,000 page book.

I know people that would charge less than that but not sure they are high level editors. They might be BA students with normal grades.

I suggested offering somebody a percentage of my book sales instead of a lump sum payment but my friend says nobody will accept that payment plan since most authors fail to generate sales.

Updates
9 mo
I meant 60,000 word book. That was a typo.
Is it true a copy editor costs $15,000 for a 60,000 page book?
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