The following monthly budgeted data are available for the Stark Company:Sales$$500,000$$$300,000$$$900,000$Variable expenses$300,000210,000720,000$Contribution margin$$200,000$$$90,000$$$180,000$Stark Company has budgeted operating income for the month is $$220,000$ from these three products.Submission instructions:a$)$ Calculate the break$-$even sales $($in total dollars$)$ for the monthb$)$ Calculate the margin of safety $($in total dollars$)$c$)$ Calculate the degree of operating leverage.