AFAIK, is between $600.00 to $1800.00 for different class of photographers charging to different type of customers, for providing different kinds of quality of products and service levels.
without know what type of customers you are serving, what types of thing can you provide, what type of profit you are looking, very hard to tell you a figures.
beside, you can charge very cheap, depend on how desperate you want the job, or very expensive depends on how unique is your works.
hope this helps.