[Canadaoer] Honorariums for Open Textbooks work?

Hi everyone, I’m hoping to get some advice on appropriate honorariums to provide to people who work on Open Textbooks. Specifically, I’d like to provide payment to someone to write a chapter for my textbook on a subject I’m not well-versed in, and I’d also like to remunerate two to three peer reviewers of the text. Does anyone have guidance on respectful sums for writing and peer-reviewing? Thanks, Lindsey ____________________ Lindsey MacCallum (she/her) Scholarly Publishing Librarian Liaison Librarian to the Humanities Mount Saint Vincent University Library K’jipuktuk (Halifax) Phone: (902) 457-6402 Website: http://www.msvu.ca/library<https://studentmail.msvu.ca/owa/redir.aspx?SU… *Note that I generally observe email-free evenings and weekends.