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Inventories

12 Months Ended

Dec. 31, 2019

13.	INVENTORIES


	December 31, 2018		December 31, 2019
	NT$		NT$
	(In Millions)		(In Millions)
Finished good s	$	11,329.8	$	8,924.5
Work in process		72,071.9		51,969.1
Raw materials		15,233.9		16,552.3
Supplies and spare parts		4,595.4		5,535.3


	$	103,231.0	$	82,981.2

Reversal of write-down of inventories resulting from the increase in net realizable value and write-down of inventories to net realizable value were included in the cost of revenue, as illustrated below:


	Years Ended December 31
	2017			2018		2019
	NT$			NT$		NT$
	(In Millions)			(In Millions)		(In Millions)
Inventory losses (reversal of write-down of inventories )	$	(840.9	)	$	1,259.5	$	(1,983.0	)

The aforementioned inventory losses (reversal of write-down of inventories) exclude computer virus outbreak losses and wafer contamination losses. Please refer to related losses in Note 38.