param:	 I:	 B :=		#constraint right hand side values
	1	40
	2	8
	3	10 ;
param:	J:	C :=
	1	8
	2	6
	3	3 ;
param A:
	1	2	3 :=	#left hand side of constraint equations
 1	1	2	-2	#A[i,j] i row label, j column label
 2	2	-1	3
 3	4	5	2 ;