Okay, let’s tackle this. So William has a broad skill set that includes retail, supply chain, strategy, and management. He’s located in San Francisco, which is a hub for tech and start-ups. Industry demand for retail and supply chain experts is steady, but not extremely high. Considering his skills and location, I’d estimate his hourly rate to be around $125. This is slightly below average for a professional with his experience and skill set in the Bay Area. However, it's also worth noting that his skill set is quite broad, which might limit his earning potential compared to someone with a more specialized skill set.