1.设进货价为x,定价为y,则y-x=240
75%y-x=-180, x=1440,y=1680
2.设成本价为x,定价为y,则200(y-x)=40000
200(95%y-x)=-10000,x=5000,y=5200
3.设成本价为x,则定价为120%x,120%x*0.8-x=-9,x=9.375
1.设进货价为x,定价为y,则y-x=240
75%y-x=-180, x=1440,y=1680
2.设成本价为x,定价为y,则200(y-x)=40000
200(95%y-x)=-10000,x=5000,y=5200
3.设成本价为x,则定价为120%x,120%x*0.8-x=-9,x=9.375