I have been contacted by a publishing company to write a teaching unit to accompany a chapter book series that they publish. I am a former teacher and I have an online business selling teaching units that I have written for popular chapter books. They want me to write something that will be downloaded for free to teachers so there would be no royalty dues owed to me. What they will do is give me a set fee for the work. They want to know my rates. I have never been hired in this way before and I have NO idea where to begin to figure out a fair rate. I estimate the project to take about 35 hours. It wouldn't be a paid by the word type thing. Anybody have any idea what a fair rate would be? I do have a Master's Degree, teaching experience and I have had my business for over 7 years so I do have some experience. Also the come would retain the copyright when they pay me so I am beign paid for the work and the rights I guess if that makes a difference in price. Any advice would be appreciated!