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Warranty Reserves (Tables)
3 Months Ended
May 31, 2021
Product Warranties Disclosures [Abstract]  
Changes in the warranty reserves
The following table shows the changes in the warranty reserves for the three months ended May 31, 2021 (dollars in thousands):
 
Balance at February 28, 2021$4,079 
Warranty costs incurred(112)
Additions charged to income170 
Balance at May 31, 2021$4,137