A corporation purchases 30,000 shares of its own $10 par common stock for $25 per share, recording it at cost. What will be the effect on total stockholders' equity? a. Increase by $300,000. b. Decrease by $750,000. c. Increase by $750,000. d. Decrease by $300,000. Machinery was purchased for $340,000. Freight charges amounted to $14,000 and there was a cost of $40,000 for building a foundation and installing the machinery. It is estimated that the machinery will have a $60,000 salvage value at the end of its 5 -year useful life. Depreciation expense each year using the straight-line method will be a. $78,800. b. $66,800. c. $57,200. d. $56,000