Thank you. Sorry I still do not quite get it because I am not t

I read the article and understand I need to choose "Change of Employer." But I do not know which one to choose under Part2-5.

c. Extend the stay of the person(s) since they now hold this status.
受益人 H 身份的延期

d. Amend the stay of the person(s) since they now hold this status.
受益人 H 身份的修正

1) It seems I should choose d. Is it right?

My 2nd question is the fee.

2) It seems it should be $320 + $500. Is it right?

Thanks a lot for your time.