Okay, let’s tackle this. So Charles has 20+ years of experience as a mediator/arbitrator, plus prior legal experience. He was an Associate Justice on the Massachusetts Appeals Court, which is a high-level position. His education from Harvard Law School adds prestige. Skills like mediation, arbitration, dispute resolution are in demand. Location is Boston, MA, which is near the hub of legal and business activity. Legal professionals with his level of experience, especially in ADR, typically charge higher rates. Maybe around $300–$500 per hour? But considering his judicial background and Harvard degree, maybe higher. Some top mediators/arbitrators can charge $600+. Let’s check averages. Mediators with his background might average $400–$600. So I’ll estimate around $450