Cleary Company manufactures and sells a single product. The​ company's sales and expenses for last year​ follow:   Total Per Unit % Sales. . . . . . . . . . . . . . . . . . . $100,000 $20 ? Variable expenses. . . . . . . ? ? ? Contribution margin. . . . . . ? ? ? Fixed expenses. . . . . . . . . . 12,000     Operating income. . . . . . . . $28,000         1. Fill in the missing numbers in the table. Use the following questions to help fill in the missing numbers in the​ table:   a. What is the total contribution​ margin? b. What is the total variable​ expense? c. How many units were​ sold? d. What is the​ per-unit variable​ expense? e. What is the​ per-unit contribution​ margin? 2. Answer the following questions about breakeven​ analysis:   a. What is the breakeven point in​ units? b. What is the breakeven point in sales​ dollars? 3. Answer the following questions about target profit analysis and safety​ margin:   a. How many units must the company sell in order to earn a profit of $50,000​? b. What is the current margin of safety in​ units? c. What is the margin of safety in sales​ dollars? d. What is the margin of safety in​ percentage?