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

solution cost   : 740.655
number of trips : 8

trip 1, 12 customers, sequence : 45 29 5 37 20 70 60 71 69 36 47 48 
   weight    : 177
   volume    : 12
   trip cost : 103.657

trip 2, 11 customers, sequence : 26 7 35 14 59 19 54 13 57 15 27 
   weight    : 180
   volume    : 11
   trip cost : 116.911

trip 3, 11 customers, sequence : 6 16 49 24 18 50 25 55 31 72 12 
   weight    : 168
   volume    : 11
   trip cost : 133.71

trip 4, 11 customers, sequence : 33 63 23 56 41 43 42 64 22 1 73 
   weight    : 178
   volume    : 11
   trip cost : 116.96

trip 5, 6 customers, sequence : 67 34 46 8 52 4 
   weight    : 141
   volume    : 6
   trip cost : 41.6354

trip 6, 8 customers, sequence : 17 40 39 9 32 44 3 51 
   weight    : 166
   volume    : 8
   trip cost : 65.249

trip 7, 9 customers, sequence : 68 2 62 28 61 21 74 30 75 
   weight    : 178
   volume    : 9
   trip cost : 79.3009

trip 8, 7 customers, sequence : 58 10 38 65 66 11 53 
   weight    : 176
   volume    : 7
   trip cost : 83.2318