I definately agree your sisters are probably not being selfish. i know toward the end of the semester i start to run out of money and suddenly $30 is a small fortune. Some of your sisters may be blessed with an awesome job or parental finances but for sisters on a budget an unforseen extra amount of cash might be a burden. I would suggest asking local companies for donations and checking with your treasure to see if you have any money set aside for philanthropies. If not I would suggest that for next fisical year's budget setting aside a certain amount of money for philanthropies other than your national ones, it will ease the hardship on sisters and event planners
have a happy day
