GROSS-TO-NET PRODUCT SALES AND SIGNIFICANT CUSTOMERS

The below table presents a GTN product sales reconciliation for the accompanying Consolidated Statement of Operations:



	2016			2015			2014
Gross product sales	$	244,770		$	215,136		$	284,685
Commercial rebates and government chargebacks	(98,317		)	(61,283		)	(76,636		)
Data and distribution fees, GPO fees, and inventory management fees	(14,979		)	(15,613		)	(21,330		)
Prompt pay discounts	(755		)	(16		)	(260		)
Product returns allowances	(2,123		)	(1,373		)	78
Net product sales	$	128,596		$	136,851		$	186,537

The below table presents the customers that represent 10% or more of our gross product sales in 2016, 2015, and 2014:



	Year Ended December 31,
	2016				2015				2014
AmerisourceBergen Corporation, and its affiliates	$	93,951	38.4	%	$	78,989	36.7	%	$	115,079	40.4	%
McKesson Corporation and its affiliates	75,952		31.0	%	73,577		34.2	%	93,656		32.9	%
Cardinal Health, Inc. and its affiliates	58,780		24.0	%	37,414		17.4	%	*		—	%
All other customers	16,087		6.6	%	25,156		11.7	%	75,950		26.7	%
Gross product sales	$	244,770	100.0	%	$	215,136	100.0	%	$	284,685	100.0	%


*	Less than 10%