RESTORE machine shop makes customized replacement parts for older equipment. All customer jobs listed must be machined first, then polished. Determine the optimal processing sequence of the six jobs listed below.

$\backslash$table$[[$Jobs$,$Machining Hrs$,$Polishing Hrs$],[$A$,5,4],[$B$,7,3],[$C$,3,2],[$D$,4,1],[$E$,1,2],[$F$,3,4]]$