Okay, let’s break this down. Pat has 42 years of experience as a designer, which is a significant amount of time. Typically, designers with this level of experience can charge higher rates. However, the location is Portola Valley, California, which is a relatively affluent area. The industry average for designers in this location is around $100-$150 per hour. Considering Pat’s skills and experience, I would estimate his hourly rate to be around $125, which is slightly above the industry average.