if you build elevators like this they have less chance to make a long queue
( from S= staff elevator E=elevator) from down to up:
EE
ES
ES
ES
ES
EE
SE
SE
SE
SE
EE
ES
ES
ES
ES
and so on, just always 4 staff elevators between 6 elevators > less queue = profit!
this is because if you have a elevator from 50stores hight it will take years before it to go down.
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