The cost of working with a hybrid publisher varies and is dependent on a number of factors. In general, a hybrid publisher will offer a range of services which may include editing, design, book marketing, ebook conversion and distribution, and other publishing-related services for a fee. In some cases, publishers may offer a fee per service or bundle packages together in order to offer a discounted rate.
The best way to get an accurate estimate of the cost of services would be to contact the hybrid publisher you're interested in working with directly. Many hybrid publishers have a website or other contact information that you can use to inquire about fees or to request a quote. Discussing your needs and what services they can offer is the best way to get an accurate cost estimate.
It's also important to consider the time you plan to dedicate to the book publishing process. You may need to factor in the cost of time along with the cost of services. The amount of time you spend prepping your book for publication, editing the manuscript, and marketing will depend on the quality of the finished product you want.
In conclusion, the cost of working with a hybrid publisher will depend on the services you desire, as well as the time you are willing to dedicate to the entire publishing process. It is best to get in touch with the hybrid publisher you are considering to discuss the services you need and to receive an accurate estimate.