Caterpillar Company produces and sells a single product. The company's income statement for the most recent month is given below: Sales (5,000 units at Tk 50 per unit) Tk 250,000 Less manufacturing costs: Direct materials Tk 48,000 Direct labor Tk 60,000 Variable factory overhead Tk 12,000 Fixed factory overhead Tk 30,000 Tk 150,000 Gross margin Tk 100,000 Less selling and other expenses: Variable selling and other expenses Tk 20,000 Fixed selling and other expenses Tk 40,000 Tk 60,000 Net operating income Tk 40,000 Note: There are no beginning or ending inventories. Required: [Marks: 3 x 4 = 12] a. Prepare a contribution format income statement. b. If the company wants a target profit of Tk 30,000 for the next month, how many units of product they have to sell? c. Find margin of safety in percentage.