The 2017 balance sheet of Kerber's Tennis Shop, Inc., showed long-term debt of $6.4 million, and the 2018 balance sheet showed long-term debt of $6.8 million. The 2018 income statement showed an interest expense of $180,000. What was the firm's cash flow to creditors during 2018? (A negative answer should be indicated by a minus sign. Enter your answer in dollars, not millions of dollars, e.g., 1,234,567.) Answer is complete but not entirely correct