Okay, let’s calculate this. David has a mix of marketing and leadership skills. His skills like customer insight, market research, strategy, and product innovation are in demand. He has limited working proficiency in Chinese, which might be a plus in a diverse market like San Francisco. However, his location in San Francisco, which is known for its tech industry, might put him in competition with more experienced professionals. Considering his skills and location, I estimate his hourly rate to be around $120, which is slightly below the average rate for marketing professionals in the US. This is because his limited working proficiency in Chinese and entry-level skills might put him at a disadvantage in terms of salary. However, his strong background in leading cross-functional teams and driving business growth through data-driven decision making are valuable assets in the marketing industry.