> $2,000: the engineering team interviewed three candidates in-house before deciding to hire Jeanne. Each interview took about 7 hours (phone screens, in-house, debrief) for about 20 hours total.

This is a rough estimate for the startup provided in this blog post, you can do this by taking the salaries, getting their assumed hourly rate, and then applying it to the amount spent interviewing.

See https://blog.usejournal.com/it-costs-50k-to-hire-a-software-...

This one cites 50k, on average though, most startups, the HR decks are generally around 10-15k with in-house recruiters. https://blog.usejournal.com/it-costs-50k-to-hire-a-software-...