From the Form 990 for Fiscal Year 2011, made available just this past May (2013).
The chargebacks, which appear on another financial report (the Deloitte-audited financials) only ever show about $100,000 being paid back to the Philadelphia-based campus.
Where do the other millions go?
[Update: last year’s (FY2010) Form 990 number was $4 million.
Five million before then (FY 2008).
And $2.45 million in FY 2009: