public function update($id)
 {
     $movement_costs = Input::get('movement_costs');
     $movement_costs = str_replace(",", ".", $movement_costs);
     $movement_costs = str_replace(".", "", $movement_costs);
     $movement_costs = substr($movement_costs, 0, -2);
     $upgrade_costs = Input::get('upgrade_costs');
     $upgrade_costs = str_replace(",", ".", $upgrade_costs);
     $upgrade_costs = str_replace(".", "", $upgrade_costs);
     $upgrade_costs = substr($upgrade_costs, 0, -2);
     $movement = Movement::findOrFail($id);
     $last_course_id = $movement->destination_id;
     $student_id = $movement->student_id;
     $movement->destination_id = Input::get('destination_id');
     $movement->employee_id = Input::get('employee_id');
     $movement->movement_date = Input::get('date');
     $movement->movement_costs = $movement_costs;
     $movement->upgrade_costs = $upgrade_costs;
     $movement->comments = Input::get('comments');
     $movement->save();
     if ((double) $upgrade_costs > 0) {
         $receivable = Receivable::where('registration_id', '=', $placement->registration_id)->first();
         $receivable->total = $receivable->total + $upgrade_costs;
         $receivable->receivable = $receivable->receivable + $upgrade_costs;
         $receivable->balance = $receivable->balance + $upgrade_costs;
         $receivable->save();
     }
     $earning_count = Earning::where('earnable_type', '=', 'Movement')->where('earnable_id', '=', $id)->count();
     if ($earning_count > 0) {
         $earning = Earning::where('earnable_type', '=', 'Movement')->where('earnable_id', '=', $id)->first();
         $earning->payment = $movement_costs + $upgrade_costs;
         $earning->save();
     }
 }