Vaughn Manufacturing had the following transactions during 2017: 1. Issued $255000 of par value common stock for cash. 2. Recorded and paid wages expense of $122400. 3. Acquired land by issuing common stock of par value $102000. 4. Declared and paid a cash dividend of $20400. 5. Sold a long-term investment (cost $6120) for cash of $6120. 6. Recorded cash sales of $816000. 7. Bought inventory for cash of $326400. 8. Acquired an investment in Zynga stock for cash of $42840. 9. Converted bonds payable to common stock in the amount of $1020000. 10. Repaid a 6-year note payable in the amount of $448800. What is the net cash provided by operating activities? a. $367200. b. $489600. c. $591600. d. $622200