So the answer is supposed to be 40,000 but I don't know how to get that. Can someone please explain it? Thanks!

How much in operating income did Albus Dumbledore Corp. report in its 2020 income statement? (just enter the number, without any commas or a dollar sign) Financial Statements for 2020 Balance Sheet Income Statement Assets Cash Accounts Receivable, Net Inventory Prepaid Rent Equipment, Net Land Total Assets 2020 2019 $ 62,000 $ 48,000 $ 26,000 $ 23,000 $ 22,000 $ 32,000 $ 40,000 $ 20,000 $ 72,000 $ 80,000 $ 30,000 $ 40,000 $ 252,000 $ 243,000 Sales Revenue $ 230,000 Cost of Goods Sold $ (135,000) Wages Expense $ (18,000) Rent Expense $ (10,000) Bad Debt Expense $ (2,000) R&D Expense $ (20,000) Depreciation Expense $ (8,000) Interest Expense $ (4,000) Gain on Sale of Land $ 3,000 Income Tax Expense $ (5,000) Net Income $ 31,000 Liabilities and Equity Accounts Payable Wages Payable Income Tax Payable Long-Term Debt Contributed Capital Retained Earnings Total Liabilities and Equity 2020 2019 $ 28,000 $ 24,000 $ 23,000 $ 17,000 $ 1,000 $ 8,000 $ 38,000 $ 38,000 $ 120,000 $ 120,000 $ 42,000 $ 36,000 $ 252,000 $ 243,000 32,000 40,000 (with margin: 0)