The lowest flow in the next network created the Small network
[50]
[-30]
$9 (co)
$4 (co)
[0]
$2 (0)
$2 (10)
S1
80
$3 (00)
00
[40]
[60]
User of the basic solution, the following placement (the companies)
[50]
[30]
40 ()
[0]
10 (10):
10 (co)
50 ()
50 (80)
[0]
[60]
The main variables are: x45, x35, x23, x14, the non-main variables are x54, x13, x12