You also need to factor in loss of productivity while bringing a new hire into an organisation. They won't be 100% productive (50% might be aspirational for so

You also need to factor in loss of productivity while bringing a new hire into an organisation. They won't be 100% productive (50% might be aspirational for some roles for the first few months) and they will also reduce the productivity of their colleagues while they are brought up to speed. $10k seems like a low figure for that.