Casey's Cases sells cell phone cases in a mall kiosk Casey charges $30 per case. The variable cost for a case, including the case, the royalty paid to the mall, and so on is $26. The monthly fixed cost for Cosey's Coses is $2.480. Required: a. How many cases must Casey sell every month to break even? b. Cosey believes that he can sell 700 coses a month. What is the margin of safety in terms of the number of cases? a Break-even point b. Margin of safety 620 cases 80 cases