Meaning of で in 敦賀から新大阪まで〈で〉２兆１０００億円かかる予定です


Regarding the construction of a new bullet train line:

> 工事のお金は、[敦賀]{つるが}から新大阪まで **で** ２兆１０００億円かかる予定です。  
>  The construction cost from 敦賀 to 新大阪 is expected to be (some eye watering
> amount of money).

I can't understand the function of the で in bold. Can it be omitted? It seems
to make sense to me without it.




That で is part of a set phrase `[purpose/item] で [price] かかる` ("to cost
[price] **for/to** [purpose]"). You can use に instead of で.

  * 1回の通話{で/に}30円かかる。 It takes 30 yen to make one call.
  * 1円玉を作るの{で/に}2円かかる。 Making a 1-yen coin costs 2 yen.
  * このスマホを製造するのに、CPUで30ドル、バッテリーで10ドルかかっています。  
It costs $30 for the CPU and $10 for the battery to manufacture this
smartphone.

In your example, that で can be omitted but it feels more formal and a bit more
natural to keep it.




That で is part of a set phrase `[purpose/item] で [price] かかる` ("to cost
[price] **for/to** [purpose]"). You can use に instead of で.

  * 1回の通話{で/に}30円かかる。 It takes 30 yen to make one call.
  * 1円玉を作るの{で/に}2円かかる。 Making a 1-yen coin costs 2 yen.
  * このスマホを製造するのに、CPUで30ドル、バッテリーで10ドルかかっています。  
It costs $30 for the CPU and $10 for the battery to manufacture this
smartphone.

In your example, that で can be omitted but it feels more formal and a bit more
natural to keep it.

