8. Inventories

Inventories consisted of the following (in millions):


	September 30,		December 31,
	2018		2017
Raw materials	$	156.1	$	152.0
Work-in-process		208.7		183.1
Finished goods		89.5		96.6
Demonstration units		64.3		54.5
Inventories	$	518.6	$	486.2

Finished goods include in-transit systems that have been shipped to the Company's customers, but not yet installed and accepted by the customer. As of September 30, 2018 and December 31, 2017, the value of inventory-in-transit was $25.5 million and $41.4 million, respectively.