[JumboJack]

First, welcome to the forum. Now take yourself up to the intro section and introduce yourself.

To answer your question, and I am tempted to give my standard tree-fiddy response, take and figure it out based on your costs of doing business. The problem is we have no idea how much your overhead and cost are.
When you have a handle on costs , ad in the profit.

If you want help, there are several companies that can help. RS Means or Craftsman books are good to start with.

I only gave you a break and gave you any answer is because of where you live. Howdy neighbor!

You ol' softy.