This simulation run uses 3 pumps and the following random number seeds:
         1         2         3         4
  Current Total  NoQueue Car->Car Average Number  Average  Pump    Total  Lost
    Time   Cars Fraction   Time   Litres  Balked    Wait  Usage   Profit Profit
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   20000    407   0.399   49.140  33.686     82   71.798  0.902   220.95  61.81
   40000    781   0.461   51.216  33.965    150   65.347  0.880   487.54 115.64
   60000   1183   0.454   50.719  34.447    224   65.750  0.889   786.30 172.47
   80000   1612   0.429   49.628  34.764    321   67.227  0.899  1095.52 245.46
  100000   2022   0.423   49.456  35.195    418   69.053  0.896  1396.56 322.53
  120000   2434   0.431   49.302  35.100    516   69.240  0.894  1678.18 397.65
  140000   2826   0.435   49.540  35.094    594   68.459  0.892  1958.98 460.40
  160000   3196   0.437   50.063  34.926    658   68.468  0.888  2228.21 502.34
  180000   3577   0.436   50.321  34.995    728   68.589  0.887  2514.99 554.46
  200000   3983   0.434   50.213  34.995    816   68.442  0.888  2801.80 622.82