Manero Company included the following information in its annual report:

	2019				2018				2017
Sales	$	178,400			$	162,500			$	155,500
Cost of goods sold		115,000				102,500				100,000
Operating expenses		50,000				50,000				45,000
Operating income		13,400				10,000				10,500

In a common-size income statement for 2019, the operating expenses are expressed as

43.8%

30.3%

100.0%

28.0%