2. Inventories

Inventories consisted of the following:


	September 30,		December 31,
	2017		2016
Retail automotive dealership new vehicles	$	2,228.4	$	2,153.0
Retail automotive dealership used vehicles		926.6		771.7
Retail automotive parts, accessories and other		129.4		119.1
Retail commercial truck dealership vehicles and parts		227.8		170.3
Commercial vehicle distribution vehicles, parts and engines		258.1		194.1
Total inventories	$	3,770.3	$	3,408.2

We receive credits from certain vehicle manufacturers that reduce cost of sales when the vehicles are sold. Such credits amounted to $15.7 million and $12.9 million during the three months ended September 30, 2017 and 2016, respectively, and $40.2 million and $38.2 million during the nine months ended September 30, 2017 and 2016, respectively.