Hi Marcia, There are many different ways you can approach your new venture.
Pricing becomes tricky at first.
I have clients that I bill per hour, or I might have a job that I quote a set price to complete. I would have a set price. You will have to determine what your time is worth per hour, also what I call set up charges. You will be using your computer, electric, ink, and the cost of the labels and disk that you will give your client. All this will factor into your quote.