The owner/provider of the practice sometimes questions why I have so many hours on my bill and I just wanted some idea of what the average time you feel an IT person should spend.
As NY2GA_Doc indicated, you should itemize your bill or at least keep a log that you attach with the bill. I know most professionals often include a log of the tasks when they bill hourly. I stepped away from that model since I can do a lot more per hour than the average tech due to previous prep work or other methods.
Rather than charge an exorbitant hourly rate. I charge per task and that also allows me to delegate tasks out to multiple individuals. E.g. when you have multiple employees working simultaneously on the same project.