What is な role here?


I cannot get what な means in the following sentence.

> 彼女はそれがいくら **な** のかわかります。

Couldn't it be written 彼女はそれがいくらのか分かります?




Because いくら is not a verb, the の of のか cannot directly follow it; な acts to
link the two.




Because いくら is not a verb, the の of のか cannot directly follow it; な acts to
link the two.

