! A juice enterprise is to supply 500 litres of juice
!
min 1.5volX +0.75volM +2volO +1.75volG +0.25volW
subject to
 -0.05volX +0.15volM -0.05volO -0.05volG -0.05volW > 0
  0.20volX -0.15volM +0.80volO -0.20volG -0.20volW > 0
  0.30volX           -0.10volO +0.90volG -0.10volW > 0
     volX < 200
     volM < 400
     volO < 100
     volG < 50
     volW < 800
     volX + volM + volO + volG + volW = 500
end