We convert weekly earnings to hourly by dividing usual weekly earnings by usual weekly hours or actual hours if usual hours is missing. (frbatlanta.org)
are you billing on actual hours of work done, or is based on a fixed 8 hours per day? (law.stackexchange.com)
Under the Fair Labor Standards Act (FLSA), you are only required to pay these employees for actual hours worked. (bcmpayroll.com)