a Corporation operates several factories in the Midwest that manufacture consumer electronics. The December 31, 2018, year- end trial balance contained the following income statement items: Account Title Debits Credits 13,300,000 58,000 Sales revenue Interest revenue Loss on sale of investments Cost of goods sold Selling expenses 108,000 6,280,000 628, 000 1,600,000 48,000 1,280,000 908,000 General and adninistrative expenses Interest expense Research and development expense Income tax expense Required Calculate the company's operating income for the year Total operating revenue Less operating expenses