show your workings please

b. Pipe Company makes professional Pipes. The profit plan and actual results for the previous year, 2020, are as follows: Actual Results Profit Plan Volume Pounds Volume Pounds Sales 25,000 300,000 22,000 330,000 Cost of Goods Sold Raw material (KG) 2,500 50,000 2,000 44,000 Raw material (L) 6,250 62,500 4,950 79,200 Labor (Hours) 2,000 46,000 2,895 57,900 Contribution Margin 141,500 148,900 Other costs Energy 15,000 10,000 Maintenance 6,000 9,000 Depreciation 10,000 15,000 Selling expenses 20,000 30,000 Advertising 5,000 12,000 Profit before interest and tax 85,500 72,900 The plant manager, Kamel, 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