Based on the limited information provided, it's challenging to estimate Doris's hourly rate accurately. However, considering her 42 years of experience in financial accounting, which is a specialized field, I would estimate her rate to be on the lower end of the scale. Typical rates for financial accountants with similar experience in the US can range from $75 to $150 per hour. Given the limited skills and experience listed, I'm rounding down to $100 per hour.