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Accounts payable and accrued expenses
3 Months Ended
Mar. 30, 2019
Payables and Accruals [Abstract]  
Accounts payable and accrued expenses Accounts payable and accrued expenses

Accounts payable and accrued expenses are as follows:
 
March 30,
2019
 
December 31,
2018
Outstanding checks in excess of cash
$
3,626

 
14,624

Accounts payable, trade
914,205

 
811,879

Accrued expenses
407,386

 
430,431

Product warranties
46,129

 
47,511

Accrued interest
7,197

 
21,908

Accrued compensation and benefits
192,730

 
197,513

Total accounts payable and accrued expenses
$
1,571,273

 
1,523,866