8.Inventories

Inventories consisted of the following (in millions):

	June 30,		December 31,
	2018		2017
Raw materials	$	158.4	$	152.0
Work-in-process	203.0		183.1
Finished goods	87.7		96.6
Demonstration units	60.3		54.5

Inventories	$	509.4	$	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 June 30, 2018 and December 31, 2017, the value of inventory-in-transit was $25.6 million and $41.4 million, respectively.