现有数值如下:122,-64,40,132,-27,-90,-51,-131,-13,-27,32,0,14,-23,165,-152,20,-20,-65,-31,-23,128,-33,-102,-133,137,49,72,-48,3,128,-90,-110,-47,-182,-50,22,-10,60,-76,28,118,-182,75,117,235,-140,83,-16,-162,-16,-5,-66,57,124,-51,-172,-21,-192,-137,-193,-120,88,56,-67,157,167,57,1,88,14,-44,-70,-239,40,24,78,81,-27,180,97,279,92,177,63,106,-122,31,-154,97,-10,91,282,159,-97,-41,74,83,4,94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!