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

solution cost   : 2006.34
number of trips : 3

trip 1, 9 customers, sequence : 8 22 29 30 2 28 27 26 18 
   weight    : 37850
   volume    : 9
   trip cost : 523.773

trip 2, 11 customers, sequence : 5 20 3 14 24 15 19 23 25 21 9 
   weight    : 34927
   volume    : 11
   trip cost : 828.111

trip 3, 12 customers, sequence : 16 32 13 17 1 4 31 6 7 12 10 11 
   weight    : 25788
   volume    : 12
   trip cost : 654.46