8. Inventories

Inventories consisted of the following (in millions):


	March 31,		December 31,
	2019		2018
Raw materials	$	178.7	$	164.5
Work-in-process		200.4		182.4
Finished goods		92.3		94.8
Demonstration units		70.4		67.9
Inventories	$	541.8	$	509.6

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 March 31, 2019 and December 31, 2018, the value of inventory-in-transit was $35.6 million and $38.3 million, respectively.