How to say prices in korean
If I must to say 1.200.000.000 won, I write:
-1.200.000천원
-120.000만원
-12억원

I know that all is correct, theoretically.
But in usual speech, is there a 'default' one?
Thanks.

Question

How to say prices in korean
If I must to say 1.200.000.000 won, I write:
-1.200.000천원 
-120.000만원
-12억원

I know that all is correct, theoretically.
But in usual speech, is there a 'default' one?
Thanks.

Answer

In daily life,  only 12억원 is good,
all the rest might be good in economics, math etc.