m = 4; % the number of raw materials 
n = 2; % the number of blended materials
q = 3; % the number of constituents 

% the ith column of C is c_i
C = [.9,  .8,  .7, .6;
     .08, .12, .2, .2;
     .02, .08, .1, .2];

% bounds on the blended product concentration  
c_min = [.85, 0.65;
         0,  0;
         0,  0];
c_max = [1,  1 ;
        .1,  .18;
        .05, .17];

FTilde = [10;10]; % limit on the flow rate of the blended material
F = [7; 2; 6; 3]; % availibility of raw materials

p = [15; 13; 11; 8]; % price of raw materials
pTilde = [21;18]; % price of the blended material 