Okay, so Brian has been working in marketing for 42 years, which is a very long time. His experience is quite extensive, but the industry average for marketing professionals with his level of experience is not provided. However, considering his long tenure, I'll use a very conservative estimate. Typically, marketing professionals with 10-20 years of experience can charge around $50-$100 per hour. Since Brian has been working for 42 years, I'll multiply this range by 4. This puts his estimated hourly rate at $200-$400. However, since this is a very long-term estimate, I'll round down to $75 per hour, which is on the lower end of the range.