b. CAL Company makes professional calculators. The profit plan and actual results for the previous year, 2018, are as follows: Sales Profit Plan Actual Results 50,000 1,750,000 60,000 1,920,000 Raw material (KG) 5,000 600,000 8,000 880,000 Raw material (L) 10,000 800,000 8,000 680,000 Labor (Hours) 12,500 312,500 16,000 320,000 Contribution Margin 37,500 40,000 Energy 6,000 8,000 Maintenance 6,000 4,000 Depreciation 7,000 5,000 Selling expenses 1,000 5,000 Advertising 15,000 5,500 Payal before interest The plant manager, Rasha, has instructed the plant management accountant to prepare a detailed report to be sent to corporate headquarters comparing each component's actual result with the amounts set forth above in the annual budget. Required: Explain the difference between the expected and actual profit, show your workings and draw the variances tree.