What does so mean?
so
Definition
Polite: opens a sentence with what follows from what you have just said.
Example sentences
The car takes four hours. So the person driving gets tired.
By train it's two hours. So we get to the beach early.
By car it's ten thousand yen for the four of us. So it's half the price of the train.
By car it's ten thousand yen for the four of us. So it's half the price of the train.