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Property and Equipment, Net
 12 Months Ended
Sep. 30, 2019
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net
Note 8 — Property and Equipment, Net
The components of property and equipment, net are:
 
As of September 30,
 
  
2019
 
  
2018
 
Computers, related equipment and software
  $
1,109,465
    $
1,027,825
 
Building and land
   
109,446
     
97,782
 
Leasehold improvements
   
230,817
     
222,812
 
Furniture, fixtures and other
   
47,813
     
43,518
 
                 
Property and equipment, gross
   
1,497,541
     
1,391,937
 
Less accumulated depreciation
   
(972,227
 )    
(895,352
 )
                 
Property and equipment, net
  $
525,314
    $
496,585
 
                 
Total depreciation expense for fiscal years 2019, 2018 and 2017, was $111,387, $105,439 and $105,027, respectively.
As of September 30, 2019 and 2018, the costs, net of accumulated depreciation of software assets developed for internal use were $171,331 and $152,366, respectively, and are presented under Computer equipment in the table above.
In fiscal year 2018, the Company purchased a land and capitalized costs related to the new building, see also Note 2.