Thank you for the note and enthusiasm toward joining Katz. I suspect that the difference in the finances needed for your studies is due to the estimated cost for living expenses (shelter, food, utilities, etc.) above and beyond the tuition and fees which are published on our website. In order to ultimately secure your F-1 visa, you need to show that you have access to these funds.
I am sorry, but at this point, I am not in the position to offer additional scholarship funds. Katz formal GA positions are actually reserved for the PhD program as opposed to the MBA program. While several MBA students work part-time on campus for 10 hours/week, it is not enough money to substantially pay for the educational expenses.
I wish I had better news for you.  lease check back with me on March 1st and I may have better information with regard to scholarship funds.
Best, Cliff
Clifford T. McCormickDirector, MBA AdmissionsJoseph M. Katz Graduate School of Business University of Pittsburgh