Okay, let’s calculate this. Donald has a broad skill set, including electronics and manufacturing, which are in demand. His experience in troubleshooting, automation, and customer support also adds value. DeVry University education suggests some formal training. Considering the skills and experience, I’m estimating an hourly rate of $125, which is below average for an engineer in the US, but reasonable for someone with a broad skill set and without a specific industry or seniority level mentioned. This rate is also lower than what I would expect for someone with more seniority or specific industry expertise.