Staley Co. manufactures computer monitors. The following is a summary of its basic cost and revenue data: Per Unit $410 Percent 100.00 51.71 212 Sales price Variable costs Unit contribution margin $198 48.29 Assume that Staley Co. is currently selling 540 computer monitors per month and monthly fixed costs are $79,200. What is Staley Co.'s degree of operating leverage (DOL) at this sales volume (i.e., at 540 units)? (Round your answer to three decimal places.) 4.641. 3.857. 4.011. 4.129. 3.416