Flow

$\backslash$table$[[$From To$,$Cost,Node,In$-$Out,Constraints,$],[1,2,30,1,0,-200],[1,4,40,2,0,100],[2,3,50,3,0,60],[3,5,35,4,0,80],[5,3,40,5,0,170],[5,4,30,6,0,70],[5,6,35,7,0,-300],[6,5,25,,,],[7,5,45,,,],[7,6,50,,,],[7,4,50,,,]]$