The following income statements are provided for Li Company's last two years of operation:

The following income statements are provided for Li Company's last two years of operation:

	2012	2013
Number of units produced and sold	4,500	4,100
Sales revenue	$69,750	$63,550
Cost of goods sold	41,700	38,000
Gross margin	28,050	25,550
General, selling and administrative expenses	17,500	16,300
Net income	$10,550	$9,250

Assuming that cost behavior did not change over the two year period, what is Li Company's contribution margin in 2013?