This is Phuong Van ( whose research paper: Web Map of Vietnam Protected Areas). I would like to ask for help as follows:

1- I had tried to register as an oral presentation during the abstract phrase. Somehow, I've just found out I am��a "poster presenter". So may I change the status of my presentation to "oral presentation" (I've just tried to do this online, but I need your confirmation).��

2. About the registration: I am in Vietnam and a PhD candidate. In this case, what will be my fee ($50 or $15)?

Thank you very much in advance

Phuong Van,