Annual report pursuant to Section 13 and 15(d)

F. ACCRUED LIABILITIES AND EXPENSES (Tables)

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F. ACCRUED LIABILITIES AND EXPENSES (Tables)
 12 Months Ended
Dec. 31, 2017
Payables and Accruals [Abstract]  
Schedule of accrued liabilities and expenses

Accrued liabilities and expenses as of December 31, 2017 and 2016 are as follows:

  

    2017     2016  
Accrued liabilities and expenses   $ 294,709     $ 223,011  
Accrued payroll and payroll taxes     230,931       331,908  
Accrued sales taxes, penalties, and interest     83,282       274,869  
Accrued interest     –       253  
Product warranties     59,892       95,540  
Total accrued liabilities and expenses   $ 668,814     $ 925,581