Section 4710. Maintenance by county

The  board of supervisors or other
  governing elective body  shall  provide  for  the  maintenance  of  such
  school,  the  repair  and improvement of the lands and buildings used or
  occupied thereby, and the equipment thereof  with  necessary  machinery,
  tools,  apparatus  and  supplies.    The  cost thereof, and the expenses
  incurred for such purposes, shall be  charges  against  the  county  and
  shall  be  audited  and paid in the same manner as other charges against
  the county.   The maintenance herein  provided  for  shall  include  the
  support,  instruction, care, board and clothing of pupils and such other
  expenses as are necessarily incurred in the operation of the school.