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Warranty (Tables)
12 Months Ended
Sep. 30, 2021
Warranty  
Schedule of warranty cost and accrual information

    

2021

    

2020

Warranty accrual as of October 1,

$

547,743

$

606,680

Expense accrual for fiscal year

 

176,028

 

67,464

Warranty cost incurred for fiscal year     

 

(134,511)

 

(126,401)

Warranty accrual as of September 30,

$

589,260

$

547,743