In a normal costing system, the cost of a job includes
  a.  actual direct materials, actual direct labor, and actual overhead.
  b.  estimated direct materials, estimated direct labor, and estimated overhead.
  c.  actual direct materials, actual direct labor, actual overhead, and actual selling cost.
  d.  actual direct materials, actual direct labor, and estimated (applied) overhead.
  e.  none of the above. Job-order costing requires the use of actual, not normal, costing.