The Filzinger Corporation's December 31, 2024 year-end trial balance contained the following income statement items: Account Title Sales revenue Interest revenue Debits Credits $ 6,525,000 63,000 45,000 14:07 Gain on sale of investments Cost of goods sold Selling expense General and administrative expense Interest expense Research and development expense Income tax expense Required: $ 4,280,000 210,000 913,000 23,000 460,000 138,000 Calculate the company's operating income for the year using a single-step income statement format. Filzinger Corporation Income Statement For the Year Ended December 31, 2024 Less operating expenses: 0 Operating income (loss)