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Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Inventories as of December 31, 2018 and 2019 are as follows:


		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


		2019
		Acquisition cost		Valuation allowance			Book value
		In millions of won
Raw materials	￦		3,790,443		(1,430	)		3,789,013
Merchandises			340		—			340
Work-in-progress			165,073		—			165,073
Finished goods			58,280		—			58,280
Supplies			2,121,363		(4,369	)		2,116,994
Inventories-in-transit			906,267		—			906,267
Other inventories			14,733		—			14,733

	￦		7,056,499		(5,799	)		7,050,700

The reversals of the allowance for loss on inventory valuation due to increase in the net realizable value of inventories deducted from cost of sales for the years ended December 31, 2017, 2018 and 2019 were ￦437 million , ￦3,723 million and ￦4,872 million, respectively.

The amounts of loss from inventory valuation included in other gains or losses for the years ended December 31, 2017, 2018 and 2019 were ￦3,875 million, ￦1,953 million and ￦3,127 million, respectively.