I show up to work, eight hour shifts (usually, OT is ten hours), and on average we produce hundreds of thousands of dollars in goods every shift.
I don't know the exact costs of materials, but I know roughly within a few cents, and let me say, the profit margins for the owner are astronomical. Most days, if we just count the material costs for the day, and labor costs for the whole YEAR, we still come out profitably. Maybe I have to run for two days to make sure annual labor costs are properly accounted for.
The other 250 days of work a year? Pure profit after material costs, which again are pennies on the dollar of revenue.