How much you charge for your product or service is up to you.
How much do you value what you offer?
You are the creator of the product or service you offer, you may have business overhead to consider in your price, or you may be a freelancer. How experienced are your, what is your reputation worth. How much value do you place on your time?
Is market location a factor in your pricing, is your pricing set in stone, or are your rates flexible?
Entrepreneurs must take into consideration what value they place on their experience, reputation, time, and portfolio of work to prove that the product or service is worth the price they charge.
How long you have been in business in relationship to other entrepreneurs should equate to different price schedules.
A writer with multiple published articles should expect a higher rate per word then someone just starting out. The newer writer would not expect the same rate because they are an unknown as far as publishers are concerned. The same goes for anyone just starting out, trying to charge high rates as a multi-published writer with credentials, and a large portfolio of work.
Pricing your product or service is about your portfolio, (clips, and publishing credits) examples that prove your worth to clients. You will also be competing for clients with other entrepreneurs running their business, so your rates need to competitive unless you can prove you are the cream at the top.
Setting your rate is about what the client list can afford. If priced too high, your clients may not hire you, too low and they might wonder if you value what you do and may not hire you.
It is not about trying to make six figures a month. Your rate should be about quality at a fair rate for you and your client.