Undergraduate tuition for the 2012/13 school year was $61,240; this includes the basic tuition of $43,380, fees (health $200, etc.), room and board of $13,329 (less if commuting), books and supplies $1,842, personal expenses $1,890, transportation cost of $400. Northwestern awards financial aid solely on the basis of need through loans, work-study, grants, and scholarships. The University processed in excess of $472 million in financial aid for the 2009–2010 academic year. This included $265 million in institutional funds, with the remainder coming from federal and state governments and private organizations and individuals. Northwestern scholarship programs for undergraduate students support needy students from a variety of income and backgrounds. Approximately 44 percent of the June 2010 graduates had received federal and/or private loans for their undergraduate education, graduating with an average debt of $17,200.
 On what basis does Southwestern award financial aid? (If the question is unanswerable, say "unanswerable")
unanswerable