Sounds more like they spent $50 and hope to make it all up in one copy.
$5,000 would be a good investment, were it well priced, as it could easily sell not just hundreds of copies, but thousands, if priced correctly (sell a thousand and you can price it at $10 for the publisher to more than make the investment back; price it low enough and even a non-fiction title like this can sell hundreds a month, or at least each semester).
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