Okay, let’s tackle this. So Maria has 18 years of experience in accounting and tax, which is a solid foundation. She’s also a co-owner of her own firm, which suggests she’s successful. Skills like Quickbooks, tax preparation, and corporate tax are in demand. Location is Tulsa, OK, which is a mid-sized city with a relatively stable economy. According to the Bureau of Labor Statistics, accountants and auditors in Oklahoma City (the largest city in the state) earn around $60,000-$80,000 per year. Considering Maria’s experience and skills, I’d estimate her hourly rate to be around $75, which is slightly above the national average. However, this is a rough estimate and may vary depending on the specific industry, client base, and other factors.