13.

Inventories


	December 31, 2018			December 31, 2017
(CAD$ in millions)				(restated)
Supplies	$	693		$	563
Raw materials		300			223
Work in process		595			529
Finished products		539			462

		2,127			1,777
Less long-term portion (Note 14)		(62	)		(108	)

	$	2,065		$	1,669

Cost of sales of $7.9 billion (2017 – $7.3 billion) include $7.3 billion (2017 – $6.6 billion) of inventories recognized as an expense during the year.

Total inventories held at net realizable value amounted to $172 million at December 31, 2018 (December 31, 2017 – $17 million). Total inventory write-downs in 2018 were $82 million (2017 – $20 million) and were included as part of cost of sales. Total reversals of inventory write-downs previously recorded was nil in 2018 (2017 – $30 million).

Long-term inventories consist of ore stockpiles and other in-process materials that are not expected to be processed within one year.