Total cost:                140169
No. of recharges:               7
No. of vehicles:                2

Route  1: Cost        72091
    D3
    C4    S8
   C12   C11    C3    S6
    C6    C7   C15    C8    S9
   C16    D4

Route  2: Cost        68078
    D1
    C1    S2
    C2   C10    S1
    C9    C5   C13    S3
   C14    S4
    D2

