he following income statement is provided for Ramirez Company in 2013: Sales revenue (2,100 units $19.60 per unit) $41,160 Cost of goods sold (variable; 2,100 units $7.60 per unit) (15,960) Cost of goods sold (fixed) (3,600) Gross margin 21,600 Administrative salaries (5,600) Depreciation (3,600) Supplies (2,100 units $1.60 per unit) (3,360) Net income $9,040 What amount was the company's contribution margin? (Do not round intermediate calculations.) $21,840 $9,040 $25,200 $21,600