	December 31,		December 25,
(In millions)	2021		2020
Raw materials	$	220.9	$	102.9
Work in process		102.5		64.5
Finished goods		55.8		13.0
Total	$	379.2	$	180.4

At December 31, 2021 and December 25, 2020, inventory balances were $379.2 million and $180.4 million, respectively. The inventory write-downs are recorded on the basis of obsolete inventory or specific identified inventory in excess of estimated usage. For fiscal years 2021, 2020 and 2019, we wrote down inventories of $6.1 million, $3.4 million and $2.5 million, respectively.

	Useful Life	December 31,			December 25,
(In millions)	(in years)	2021			2020
Land	n/a	$	4.7		$	3.8
Buildings	50		52.1			37.2
Leasehold improvements	*		67.3			46.7
Machinery and equipment	5-10		132.6			73.8
Computer equipment and software	3-10		57.7			42.5
Furniture and fixtures	5		5.2			4.4
			319.6			208.4
Accumulated depreciation			(116.0	)		(84.0	)
Construction in progress			38.7			34.8
Total		$	242.3		$	159.2

During the first quarter of fiscal year 2020, the Company made a strategic decision to fully integrate Quantum Global Technologies, LLC’s (“QGT”) corporate office responsibilities from Quakertown, PA to UCT’s corporate office in Hayward, CA. As a result, the Company recorded a restructuring charge of $1.9 million for the fiscal year ended December 25, 2020, in general and administrative expense, primarily related to employee severance as well as the impaired value of the facility lease and losses on sale of equipment.

During the fourth quarter of fiscal year 2019, the Company made a strategic decision to close its machining operations in South San Francisco, CA. As a result, the Company recorded a restructuring charge of $12.6 million for fiscal year ended December 27, 2019, in general and administrative expense, related to the sale of equipment, facility leases, severance and write down of inventory.