Okay, let’s break it down. Andrea has a broad range of skills, but they are mostly in marketing and related fields. She has a solid educational background, but it’s not in a highly specialized field. The location is the Washington DC-Baltimore Area, which is a competitive market for marketing professionals. Considering her skills and location, I would estimate her hourly rate to be around $75, which is a relatively standard rate for a marketing professional in this area with similar skills. This rate is slightly below average, but it's still a good starting point.