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Inventories (Tables)
3 Months Ended
Aug. 31, 2021
Inventories  
Summary of inventories

August 31, 

    

May 31, 

    

2021

2021

Aircraft and engine parts, components and finished goods

$

450.2

$

468.4

Raw materials and parts

 

57.2

 

53.0

Work-in-process

18.4

19.2

$

525.8

$

540.6