[Letter from Suzanne M. Bump, Auditor of the Commonwealth, to His Excellency Deval Patrick, Governor of the Commonwealth, the Honorable Therese Murray, President of the Senate, the Honorable Robert A. DeLeo, Speaker of the House, the Honorable Stephen Brewer, Chair, Senate Committee on Ways and Means, the Honorable Brian S. Dempsey, Chair, House Committee on Ways and Means, regarding the projected fiscal 2012 local cost for transportation of certain homeless students]