@charlie-eve-ryan Sure! BTW, if they just don't get it, then perhaps an analogy such as "What are the normal fees for a house?" might apply. As we all know, houses can range from dirt cheap (small, run-down house in a really bad area) to extremely expensive (the kind of house I will never own - haha), and the house fees change depending upon the costs of materials, labor, and all the other economic factors at the time of building the house.
BTW, this kind of thing happened a lot with web development. I would always get asked "how much do you charge for websites?" I laugh just writing that question, because the response questions are many and the price range is massive depending on if they want a simple brochure website using an off-the-shelf CMS and template that they take responsibility for shared-hosting & such, or if they want a proprietary, enterprise-level web system hosted on their own servers with CDN of heavy media along with user profiles, ecommerce, and all the tons of other things that come with that and more.
Anyway, glad to share thoughts :)