The Filzinger Corporation's December 31, 2021 year-end trial balance contained the following income statement items: Account Title Debits Credits Sales revenue Interest revenue 6,600,000 66,000 Gain on sale of investments 48,000 Cost of goods sold 4,265,000 Selling expense 270,000 General and administrative expense 928,000 Interest expense 26,000 Research and development expense 520,000 Income tax expense 141,000 Required: Calculate the company's operating income for the year using a single-step income statement format. Less operating expenses: Income Statement