Specbook Pricing

Hi
any advice on how much I can charge for putting together specbook for designer? Including elevations, floor plans, material info. The project was designed by the designer I just put together the book which is about 60 pgs for a commercial multi-family design. As a freelancer do you know what a “normal” hourly rate so I can get an idea based on how many hours I put in…
any leads are appreciated.