You never know where you’ll be when a client calls you and needs a quote. Do not be pithy and quote from Indiana Jones and the Last Crusade: “I worte it down so I don’t have to remember!”
I was in the grocery store the other day when a potential client called. I knew my rates including session fees, length of run, etc. I had the info in my mental Rolodex and gave him the quote right away, no delays. There was no “Let me call you back when I’m done trying to decide between Count Chocula and Cocoa Puffs”. Count Chocula every time, BTW.
Professional and always ready to give the client what they need, right away.