x_ij	MODI					
	3	6	4	5		
5	1	4	0	0	5	
7	0	2	0	5	7	
6	2	0	4	0	6	
	3	6	4	5		
						
unit costs c_ij					total	41
	3	6	4	5	dif	dif
5	2	1	3	4	1	2
7	6	2	6	1	1	1
6	7	3	3	3	0	0
dif	4	1	0	2		
NW solution						
x_ij						
	3	6	4	5		
5	3	2	0	0	5	
7	0	4	3		7	
6	0	0	1	5	6	
	3	6	4	5		
						
x_ij	index					
	3	6	4	5		
5		5				
7	1	1		5		
6	2		4