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Inventories (Tables)
3 Months Ended
Aug. 31, 2021
Inventories The components of inventories follow:
(in thousands)
  
August 31,
2021
    
May 31,
2021
 
Raw materials
   $  50,244      $  47,588  
Work-in-process
     6,704        6,412  
Finished and purchased goods
     45,161        46,701  
    
 
 
    
 
 
 
     $  102,109      $  100,701