现在想给妈妈延期，网上有一项是
Are you a B-2 visitor applying to extend your stay, or are you applying to
change your status to that of an F-1 or M-1 student?
Yes，
Person/People who will provide financial support:
Provide the following information concerning how you will support yourself
financially in the United States in your requested status. Complete all that
apply
Amount of financial support to be provided per month:
填多少合适，可以不填吗？
谢谢。
