I found a really neat calculator to help you figure your costs and help you set up prices for sessions and prints. For the hourly rate, be sure to use how much you need to earn per hour and not what you charge a client. Just leave blank any areas that do not apply to your business model.
Session Cost Calculator - The Artist Mentors
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Don Barnes
The Photographers,
www.thephotographers.cc
The Ark was built by amateurs, The Titanic by professionals.
88mm gray filter plus whatever camera needed to activate it.