!Keyword: fuel, blending;
MAX    18.4 RG + 3.6 HF - 7.3 BT - 12.5 HN - 18.2 CR
     SUBJECT TO
          ! Raw material and capacity limits
      2)    BT <=   1000
      3)    RG +  HF <=   12000 
          ! Octane requirement
      4)  - 94 RG + 120 BT + 74 HN + 100 CR >=    0
          ! Vapor pressure requirement
      5)  - 11 RG + 60 BT + 4.1 HN + 2.6 CR <=    0
          ! Volatility requirement
      6)  - 17 RG + 105 BT + 12 HN + 3 CR >=    0
             ! Batch size of RG
      7)     RG -  BT - HN  -  CR =   0
     END


