It adds a event with an eventID startng from 0.
You did pay on a trip or event add money you paid.
It will show net amount of money present in an Event. Net 0 means all money is settled.
It will show status of all users.
It will show status of user who clicked it.
It will help you fetch money from an event it is basically money spent on you. It will simultaneously update users' log and event's log