Consulting Fees

<humor type="sarcasm" seriousness="15%">

In the spirit of High School Physics:

1. Conduct Experiment;
2. Determine Result;
3. Fudge Data.

you might try

1. Determine what customer wants to, or is able to, pay;
2. Divide that by how many hours you think it will take;
3. This equals your hourly rate.

</humor>