!ENCE 360, Min Cost Flow with Losses LP, LINDO formulation, Version 2
!Dr. Steven A. Gabriel
!
minimize 100x12+50x13+75x23+60x24+90x34 !Total cost of flow
s.t. 
x12+x13=3              !Node 1: conservation of flow
0.98x12-x23-x24=0      !Node 2: conservation of flow
0.97x13+0.95x23-x34=0  !Node 3: conservation of flow
0.96x24+0.99x34=3      !Node 4: conservation of flow
end
! nonnegative variables assumed