Luther Inc has 4,000 shares 5%, $50 par value, cumulative preferred stock and 100,000 shares of $1 par value common stock outstanding at December 31, 2018, December 31, 2017 and December 31, 2016. the Board of Directors cleared and paid an $8000 dividend in 2016 and 2017. In 2018 $40,000 of dividends are declared and paid. what are the dividends received by the preferred stockholders in 2018?