6.INVENTORY

		December 31, 2018		December 31, 2017
Finished goods	$	230,315	$	256,185
Raw materials and supplies		3,438,086		3,724,058
	$	3,668,401	$	3,980,243

Included in cost of goods sold is $5,974,854 (2017 - $3,376,123; 2016 - $4,642,761) of direct material costs recognized as expense.

Inventory write-off during the year was $26,031 (2017 - $668,383; 2016 - $Nil) of which $Nil (2017 - $470,654; 2016 - $Nil) is included in cost of goods sold and $26,031 (2017 - $197,729; 2016 - $Nil) is included in general and administrative expenses.