----------------  SOLUTION  -------------------

solution cost   : 375.28
number of trips : 4

trip 1, 5 customers, sequence : 17 20 18 15 12 
   weight    : 5900
   volume    : 488
   trip cost : 83.668

trip 2, 6 customers, sequence : 10 8 3 4 11 13 
   weight    : 5400
   volume    : 621
   trip cost : 102.581

trip 3, 4 customers, sequence : 16 19 21 14 
   weight    : 5600
   volume    : 483
   trip cost : 76.861

trip 4, 6 customers, sequence : 9 7 5 2 1 6 
   weight    : 5600
   volume    : 519
   trip cost : 112.17

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----------------  BIN PACKING  -------------------

trip 1 - vehicule packing see 2l_cvrp0505_T1.png
-----------------
customer 17, list of items : 1 2 
customer 20, list of items : 3 4 
customer 18, list of items : 5 6 7 8 9 
customer 15, list of items : 10 11 12 
customer 12, list of items : 13 14 15 16 17 

trip 2 - vehicule packing see 2l_cvrp0505_T2.png
-----------------
customer 10, list of items : 1 
customer 8, list of items : 2 3 
customer 3, list of items : 4 
customer 4, list of items : 5 6 7 8 9 
customer 11, list of items : 10 11 12 13 
customer 13, list of items : 14 15 

trip 3 - vehicule packing see 2l_cvrp0505_T3.png
-----------------
customer 16, list of items : 1 2 3 4 
customer 19, list of items : 5 6 7 8 
customer 21, list of items : 9 10 
customer 14, list of items : 11 12 13 

trip 4 - vehicule packing see 2l_cvrp0505_T4.png
-----------------
customer 9, list of items : 1 2 
customer 7, list of items : 3 4 5 
customer 5, list of items : 6 
customer 2, list of items : 7 8 9 
customer 1, list of items : 10 11 
customer 6, list of items : 12