2. Operating loss is 18.000 TL when sales revenue is 420.000 TL and operating income is 108.000 TL when sales revenue is 840.000 TL. Required: By using information above, calculate: 25 points a) Total fixed costs b) BEP in TL. c) Contribution margin ratio. d) Unit contribution margin if selling price is 300 TL per unit. e) Operating profit when company sells 3,000 units (selling price is 300 TL per unit), f) Sales revenue to earn 144.000 TL operating profit