If a buyer retailed a dress for ¥100, which costs him ¥60 each purchased from a supplier. At the end of the period, the buyer sold out 50 units of the dresses , what is the (1) ¥MU and (2) MU% for each dress, and what is the (3) ¥GM and (4) GM % for this period? 整数取整,小数保留两位。 ¥和%符号可省略。