Based on the provided information, I've made an estimate of Carol's hourly rate. As a Chief of Staff at a company like Kendall Investments, she likely has a strong background in leadership, operations, and possibly finance or business development. Given her location in Beverly Hills, California, and the industry she's in, her rate might be on the higher side for an executive with her experience. Considering these factors, I've estimated her hourly rate to be around $150, which is slightly below the average rate for a Chief of Staff in the finance or investment industry in the Los Angeles area, but still reflective of her experience and qualifications.