Okay, let’s break this down. Subramanian has a Master’s degree in Chemical Engineering from NIT-Tiruchirapalli, which is a reputable institution. He has 7+ years of experience in coaching students for Maths and IITJEE, which are in-demand subjects. However, his role as a tutor and lecturer is more educational and less technical compared to software engineers or data scientists. Considering his location in Hyderabad, India, and his experience, I estimate his hourly rate to be around $75, which is on the lower side for a Master’s degree holder in a technical field. However, given the nature of his role, I've rounded down from a possible $100-$150 per hour.