I know the right answer, but do not know how to compute it. Please be very detailed in computation

Dehesa, Inc. has 8,000 shares of 5%, $50 par, cumulative preferred stock and 50,000 shares of $3 par common stock outstanding. No dividends were declared last year, However, the board of directors has just declared a $50,000 dividend this year to be paid in 10 days. What amount of the total dividend will be paid to common stockholders? $10,000 $15,000 $50,000 $30,000