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

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2021

    

2020

Warranty accrual as of October 1,

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$

547,743

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$

606,680

Expense accrual for fiscal year

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176,028

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67,464

Warranty cost incurred for fiscal year     

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(134,511)

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(126,401)

Warranty accrual as of September 30,

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$

589,260

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$

547,743