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Inventories
9 Months Ended
Feb. 28, 2019
Inventories
2. 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:
 
 
 
February 28,
 
 
May 31,
 
 
 
2019
 
 
2018
 
 
 
(in thousands)
 
Raw materials
 
$
38,944
 
 
$
36,702
 
Work-in-process
 
 
6,758
 
 
 
5,993
 
Finished and purchased goods
 
 
39,168
 
 
 
33,310
 
 
 
$
84,870
 
 
$
76,005