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

	Infrastructure Group			Aggregate and Mining Group			Energy Group		Total
Net Sales-Domestic:
Equipment sales	$	102,724		$	57,989		$	41,911	$	202,624
Pellet plant agreement sale charge		(75,315	)		--			--		(75,315	)
Parts and component sales		29,269			18,311			11,479		59,059
Service and equipment installation revenue		3,283			564			1,332		5,179
Used equipment sales		1,384			652			768		2,804
Freight revenue		3,216			1,912			1,617		6,745
Other		511			(535	)		2,314		2,290
Total domestic revenue		65,072			78,893			59,421		203,386

Net Sales-International:
Equipment sales		12,040			23,385			9,075		44,500
Parts and component sales		4,310			12,070			3,280		19,660
Service and equipment installation revenue		644			328			229		1,201
Used equipment sales		661			630			583		1,874
Freight revenue		429			967			412		1,808
Other		46			24			29		99
Total international revenue		18,130			37,404			13,608		69,142

Total net sales	$	83,202		$	116,297		$	73,029	$	272,528

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

	Infrastructure Group			Aggregate and Mining Group			Energy Group		Total
Net Sales-Domestic:
Equipment sales	$	188,242		$	121,483		$	78,643	$	388,368
Pellet plant agreement sale charge		(75,315	)		--			--		(75,315	)
Parts and component sales		70,382			36,145			22,794		129,321
Service and equipment installation revenue		5,211			890			3,428		9,529
Used equipment sales		3,009			2,063			935		6,007
Freight revenue		7,254			3,720			2,949		13,923
Other		775			(1,571	)		2,427		1,631
Total domestic revenue		199,558			162,730			111,176		473,464

Net Sales-International:
Equipment sales		17,955			45,712			13,837		77,504
Parts and component sales		9,372			22,359			5,752		37,483
Service and equipment installation revenue		1,457			640			229		2,326
Used equipment sales		1,164			1,486			583		3,233
Freight revenue		683			2,297			676		3,656
Other		107			140			68		315
Total international revenue		30,738			72,634			21,145		124,517

Total net sales	$	230,296		$	235,364		$	132,321	$	597,981