Carla Vista Manufacturing Lad has provided you with the following CVP income statement Sales (1.280 unit $857,600 Variable costs Cost of goods sold 409,728 Selling expenses 70,400 Administrative expenses 60.160 Contribution margin 317.312 Fixed costs Cost of goods sold 157,440 Selling expenses 48,640 Administrative expenses 30.720 Operating income $80.512 (a) Calculate the contribution margin ratio (Round answer to 2 decimal places, eg 15.25%) Contribution margin ratio