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15. ACCRUED WARRANTY (Tables)
12 Months Ended
Dec. 31, 2020
Accrued Warranty  
Warranty Reserve Activity
   

December 31,

2020

   

December 31,

2019

 
Beginning accrued warranty costs   $ 30,000     $ 30,000  
Provision for warranty expense     101,041       2,609  
Settlement of warranty claims     (63,041 )     (2,609 )
Ending accrued warranty costs   $ 68,000     $ 30,000