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Accounts payable and accrued expenses
3 Months Ended
Mar. 28, 2020
Payables and Accruals [Abstract]  
Accounts payable and accrued expenses Accounts payable and accrued expenses

Accounts payable and accrued expenses are as follows:
 
At March 28, 2020
 
At December 31, 2019
Outstanding checks in excess of cash
$
6,981

 
9,924

Accounts payable, trade
899,178

 
824,956

Accrued expenses
409,445

 
461,035

Product warranties
51,983

 
49,184

Accrued interest
6,856

 
21,050

Accrued compensation and benefits
179,642

 
192,991

Total accounts payable and accrued expenses
$
1,554,085

 
1,559,140