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Inventories

12 Months Ended

Dec. 31, 2018

16.

Inventories

Inventories as of December 31, 2017 and 2018 are as follows:


		2017
		Acquisition cost		Valuation allowance			Book value
		In millions of won
Raw materials	￦		3,528,835		(2,829	)		3,526,006
Merchandise			107		—			107
Work-in-progress			138,709		(1,028	)		137,681
Finished goods			72,923		(1,517	)		71,406
Supplies			1,581,661		(3,940	)		1,577,721
Inventories in transit			679,358		—			679,358
Other inventories			9,807		—			9,807

	￦		6,011,400		(9,314	)		6,002,086


		2018
		Acquisition cost		Valuation allowance			Book value
		In millions of won
Raw materials	￦		3,886,739		(2,609	)		3,884,130
Work-in-progress			189,907		(1,028	)		188,879
Finished goods			50,526		—			50,526
Supplies			1,858,751		(3,907	)		1,854,844
Inventories in transit			1,196,113		—			1,196,113
Other inventories			13,761		—			13,761

	￦		7,195,797		(7,544	)		7,188,253

The reversals of the allowance for loss on inventory valuation due to increase in the net realizable value of inventory deducted from cost of sales for the years ended December 31, 2016, 2017 and 2018 were ￦2,473 million, ￦437 million and ￦3,723 million, respectively.

The amounts of loss from inventory valuation included in other gains or losses for the years ended December 31, 2016, 2017 and 2018 were ￦2,683 million, ￦3,875 million and ￦1,953 million, respectively.