$500,000 divide by 52 weeks = $9,615 / week
$9,615 / (40 hours + (60 hours overtime x 1.5)) = $73.96 hourly wage
His average week seems to be closer to 60 hours, 100 hour weeks just happen once in a while, also I'm pretty sure he gets some time off, just has to remain available. So it's more like
$500,000 divided by 50 weeks = $10,000 / week
$10,000 / (40 hours + (20 hours overtime x 1.5)) = $142.86 hourly wage
Or it may be completely random and the numbers are made up.
$500,000 divide by 52 weeks = $9,615 / week
$9,615 / (40 hours + (60 hours overtime x 1.5)) = $73.96 hourly wage