(900x+0,07y)*0,6-0,03*(8000x+0,4y)=540x+0.042y-240x-0.012y=300x+0.03y
300x+0.03y=300*(0,01)+0.03*(100)=3+3=6
(900x+0,07y)*0,6-0,03*(8000x+0,4y)=540x+0.042y-240x-0.012y=300x+0.03y
300x+0.03y=300*(0,01)+0.03*(100)=3+3=6