The following data sets and macro variables contain the input data that are used in this example:

data crude_data;
   input crude $ crude_ub;
   datalines;
crude1 20000
crude2 30000
;

data arc_data;
   input i $18. j $18. multiplier;
   datalines;
source            crude1            6
source            crude2            6
crude1            light_naphtha     0.1
crude1            medium_naphtha    0.2
crude1            heavy_naphtha     0.2
crude1            light_oil         0.12
crude1            heavy_oil         0.2
crude1            residuum          0.13
crude2            light_naphtha     0.15
crude2            medium_naphtha    0.25
crude2            heavy_naphtha     0.18
crude2            light_oil         0.08
crude2            heavy_oil         0.19
crude2            residuum          0.12
light_naphtha     regular_petrol    .  
light_naphtha     premium_petrol    .  
medium_naphtha    regular_petrol    .  
medium_naphtha    premium_petrol    .  
heavy_naphtha     regular_petrol    .  
heavy_naphtha     premium_petrol    .  
light_naphtha     reformed_gasoline 0.6
medium_naphtha    reformed_gasoline 0.52
heavy_naphtha     reformed_gasoline 0.45
light_oil         jet_fuel          .
light_oil         fuel_oil          .
heavy_oil         jet_fuel          .
heavy_oil         fuel_oil          .
light_oil         light_oil_cracked 2  
light_oil_cracked cracked_oil       0.68
light_oil_cracked cracked_gasoline  0.28
heavy_oil         heavy_oil_cracked 2  
heavy_oil_cracked cracked_oil       0.75
heavy_oil_cracked cracked_gasoline  0.2
cracked_oil       jet_fuel          .
cracked_oil       fuel_oil          .
reformed_gasoline regular_petrol    .  
reformed_gasoline premium_petrol    .  
cracked_gasoline  regular_petrol    .  
cracked_gasoline  premium_petrol    .  
residuum          lube_oil          0.5
residuum          jet_fuel          .
residuum          fuel_oil          .
;

data octane_data;
   input i $18. octane;
   datalines;
light_naphtha      90
medium_naphtha     80
heavy_naphtha      70
reformed_gasoline 115
cracked_gasoline  105
;

data petrol_data;
   input petrol $15. octane_lb;
   datalines;
regular_petrol 84
premium_petrol 94
;

data vapour_pressure_data;
   input oil $12. vapour_pressure;
   datalines;
light_oil   1.0
heavy_oil   0.6
cracked_oil 1.5
residuum    0.05
;

data fuel_oil_ratio_data;
   input oil $12. coefficient;
   datalines;
light_oil   10
cracked_oil  4
heavy_oil    3
residuum     1
;

data final_product_data;
   input product $15. profit;
   datalines;
premium_petrol 700
regular_petrol 600
jet_fuel       400
fuel_oil       350
lube_oil       150
;

%let vapour_pressure_ub = 1;
%let crude_total_ub = 45000;
%let naphtha_ub = 10000;
%let cracked_oil_ub = 8000;
%let lube_oil_lb = 500;
%let lube_oil_ub = 1000;
%let premium_ratio = 0.40;