12 The Filzinger Corporation's December 31, 2021 year-end trial balance contained the following income statement sams Account Title Debits 10 Sales revenue Interest revenue Gain on sale of investments Cost of goods sol Selling expense General and administrative expense Interest expense Research and development expense Income tax expense Required Credits 6,825,000 75,000 57,000 3,950,000 450,000 973,000 35,00 700,000 150,000 Calculate the company's operating income for the year using a single-step income statement format Les operating expenses Income Statement Opening income (os) Check