Okay, let’s break it down. Marc Slott has 21 years of experience in publishing, which is a significant amount of time. In the publishing industry, experience is highly valued. Based on national averages for publishing professionals with similar experience, I estimate Marc could charge around $125 per hour. This is slightly lower than the average rate for publishing professionals, but considering his experience and skills, it’s a reasonable estimate. He could potentially charge more, but this rate reflects his level of experience and the current market demand.