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Metropolitan Casting Services started the year with total assets of $120,000 and total liabilities of $50,000. The revenues and the expenses for the year amounted to $150,000 and $70,000, respectively. During the year, the company did not issue any common stock, but it distributed dividends of $60,000. Calculate the amount of increase or decrease in stockholders' equity for the year A, a $20,000 increase B. a $70,000 decrease C. a $90,000 increase D. a $60,000 increase