1,周五是最高价。13-0.29+0.06-0.12+0.24+0.25=13.14 最低价是周三,13-0.29+0.06-0.12=12.652,,13.14*1000(1-1.5/1000-1/1000)-13*1000(1+1.5/1000)=13107.15--13019.5=87.653, 13.14-0.25=12.89