Okay, let’s tackle this. So Rosa Maria Solis has 12 years of experience as a research professional, which is a solid foundation. However, the specific job title 'Staff Research Associate' might be more entry-level. Location is Corona, California, which is in the US, but without a specific industry or skill set, it’s challenging to estimate a rate. Generally, research professionals in the pharmaceutical industry can charge around $50–$100 per hour, depending on experience and location. Considering her 12 years of experience, maybe around $75 per hour, which is a reasonable estimate.