I charge $30AUD an hour for freelance WordPress development. Billing monthly an average of 8 hours ($240) for maintenance and support for an agency which isn't

I charge $30AUD an hour for freelance WordPress development. Billing monthly an average of 8 hours ($240) for maintenance and support for an agency which isn't much but nice extra income on the side and the occasional from scratch projects (charges depending on requirement). Main job is a front end developer (angularjs).