https://support.google.com/edu/classroom/thread/330002184/faqs-public-is–actually-fully-refundable

https://support.google.com/edu/classroom/thread/330002184/faqs-public%C2%AE-is-%F0%9D%99%80%F0%9D%99%AD%F0%9D%99%A5%F0%9D%99%9A%F0%9D%99%99%F0%9D%99%9E%F0%9D%99%96-actually-fully-refundable