(1)设蚂烂弊原销售电闷族价为X (x+0.03)×40+(x-0.25)×60=42.2 x=0.56 平段:0.56+0.03=0.59(千瓦时/元) 谷段:0.56-0.25=0.31(千瓦时/元)(2)历薯0.56×(40+60)=56(元)