Selected Income Statement Information Selected Income Statement Information (Notes)

12 Months Ended

Dec. 31, 2018

SELECTED INCOME STATEMENT INFORMATION

The following schedule shows our revenue, costs and gross margins by services and products:



	Year Ended December 31,
(in thousands)	2018			2017			2016
Revenue:
Services	$	1,245,927		$	1,181,229		$	1,509,786
Products	663,555			740,278			761,817
Total revenue	1,909,482			1,921,507			2,271,603
Cost of Services and Products:
Services	1,135,084			1,040,817			1,330,218
Products	578,212			625,843			615,438
Unallocated expenses	66,960			60,237			46,720
Total cost of services and products	1,780,256			1,726,897			1,992,376
Gross margin:
Services	110,843			140,412			179,568
Products	85,343			114,435			146,379
Unallocated expenses	(66,960		)	(60,237		)	(46,720		)
Total gross margin	$	129,226		$	194,610		$	279,227