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Inventories
3 Months Ended
Aug. 31, 2020
Inventories
3. INVENTORIES 
Inventories are stated at the lower of cost, determined by the
first-in,
first-out
method, or net realizable value. The components of inventories follow:
 
(in thousands)
  
August 31,
2020
 
  
May 31,
2020
 
Raw materials
  
$
47,589
 
  
$
45,058
 
Work-in-process
  
 
6,323
 
  
 
6,887
 
Finished and purchased goods
  
 
43,661
 
  
 
43,108
 
 
  
 
 
 
  
 
 
 
 
  
$97,573
 
  
$95,053