Okay, let’s tackle this. So Sheldon Mandel has 59 years of experience as a medical practitioner, which is extremely long. Typically, medical professionals with his level of experience might charge higher rates. However, considering his retired status and the fact that he doesn’t have a specific industry or job title mentioned, I’m estimating his rate to be on the lower side. Maybe around $40–$60 per hour for a retired medical practitioner with basic skills like Microsoft Office and customer service. But since he also has experience in clinical research and healthcare, I’ll round down to $45 per hour.