现有数值如下:3,-5,-95,45,28,43,85,45,-70,-25,-6,138,-55,7,-38,72,-80,-51,67,-128,-62,-63,67,28,142,123,13,123,38,1,95,25,-42,159,91,-35,82,-68,107,278,133,91,-25,244,16,48,19,-5,54,3,78,-127,22,73,-96,-48,-26,115,150,95,30,-5,-200,-264,-162,-144,-103,62,-91,-22,-118,-112,-9,24,97,-71,94,153,-48,10,-27,54,-137,21,133,27,94,-117,-139,38,47,-34,75,52,225,46,60,31,97,8将其转为20行5列的矩阵,对其每行内容求和,筛选出求和列中大于等于50%分位的所有行,则这些行中所有数值的总和是多少?计算过程中所有数据位浮点数,保持2位小数!