Gamma Corp started the period with a credit to the Retained Earnings (beginning balance) of 100 and ended it with a debit of 50 (ending balance). It started the period with a credit to Dividends Payable of 30 (beginning balance) and ended it with a credit of 20 (ending balance). The net income for the period was negative 100 (i.e., a loss). All dividends were cash dividends. How much dividends was paid by Gamma during the period?