That is (approximately) accounting for two weeks of annual leave, but not budgeting for illness or other factors, I normally go with "roughly 200 work-days" (so

That is (approximately) accounting for two weeks of annual leave, but not budgeting for illness or other factors, I normally go with "roughly 200 work-days" (socialist Europe, here, so I start from a base-line of five weeks of annual leave), that gives 1600 worked hours per person, taking it to 160 million hours. Still, plenty.