Okay, let’s tackle this. So Marina has 21 years of experience as an Interior Designer, which is a significant amount of time. In Miami, Florida, the cost of living is relatively high. Interior designers with her level of experience can charge higher rates. According to the Bureau of Labor Statistics, the median annual salary for interior designers in the United States is around $55,000. However, experienced designers can charge upwards of $100 per hour. Considering Marina's expertise in residential design and her location in Miami, I would estimate her hourly rate to be around $100, which is slightly higher than the national average.