6. INVENTORIES

Inventories include the following components:



	As of		As of
	December 31, 2018		December 31, 2017
Stockpiled ore	$	6,613	$	22,998
In-process ore	4,188		4,014
Materials and supplies	23,659		22,677
Finished goods	736		964
Total	$	35,196	$	50,653

The cost of inventories expensed for the year ended December 31, 2018 and 2017 was $209.4 million and $209.2 million, respectively.

Net realizable value adjustments of $2.8 million was recorded for stockpiled ore during the year ended December 31, 2018 (year ended December 31, 2017 - $3.5 million).

During the year ended December 31, 2018, a total of $2.8 million materials and supplies inventories were written off at Wassa. These are primarily related to open-pit mining equipment, materials and supplies as open-pit mining at Wassa was terminated in the first quarter of 2018. There were no write offs in the prior period.