The following table disaggregates our revenue by major source for the three-month period ended September 30, 2018 (excluding intercompany sales):

	Infrastructure Group		Aggregate and Mining Group			Energy Group		Total
Net Sales-Domestic:
Equipment sales	$	38,377	$	43,742		$	44,930	$	127,049
Parts and component sales		22,526		19,238			9,601		51,365
Service and equipment installation revenue		2,682		533			1,122		4,337
Used equipment sales		1,526		292			2,642		4,460
Freight revenue		2,527		1,887			1,439		5,853
Other		60		(395	)		1,437		1,102
Total domestic revenue		67,698		65,297			61,171		194,166

Net Sales-International:
Equipment sales		12,766		23,758			3,781		40,305
Parts and component sales		5,018		10,610			2,428		18,056
Service and equipment installation revenue		911		263			147		1,321
Used equipment sales		233		467			42		742
Freight revenue		437		1,212			241		1,890
Other		--		128			5		133
Total international revenue		19,365		36,438			6,644		62,447

Total net sales	$	87,063	$	101,735		$	67,815	$	256,613

The following table disaggregates our revenue by major source for the nine-month period ended September 30, 2018 (excluding intercompany sales):

	Infrastructure Group			Aggregate and Mining Group			Energy Group		Total
Net Sales-Domestic:
Equipment sales	$	226,619		$	165,225		$	123,573	$	515,417
Pellet plant agreement sale charge		(75,315	)		--			--		(75,315	)
Parts and component sales		92,907			55,383			32,395		180,685
Service and equipment installation revenue		7,892			1,424			4,550		13,866
Used equipment sales		4,535			2,355			3,577		10,467
Freight revenue		9,781			5,608			4,389		19,778
Other		837			(1,967	)		3,862		2,732
Total domestic revenue		267,256			228,028			172,346		667,630

Net Sales-International:
Equipment sales		30,720			69,470			17,618		117,808
Parts and component sales		14,390			32,969			8,180		55,539
Service and equipment installation revenue		2,368			902			376		3,646
Used equipment sales		1,397			1,954			625		3,976
Freight revenue		1,121			3,509			918		5,548
Other		107			268			73		448
Total international revenue		50,103			109,072			27,790		186,965

Total net sales	$	317,359		$	337,100		$	200,136	$	854,595