Okay, let’s calculate this. Martaguna has a mix of technical and teaching skills, which is not uncommon in Indonesia. However, her experience as a tutor and education background suggest a more modest rate. Considering her skills and experience, I would estimate her hourly rate to be around $50, which is a common range for educational technology professionals in Indonesia. This rate is also lower than what I would expect for a more experienced programmer or web developer in the same location. So, $50 seems like a reasonable estimate for Martaguna's hourly rate.