The bed and breakfast host tells us that she will prepare dinner for us. And I say:

[B45]

The bed and breakfast host tells us that she will prepare dinner for us. And I say:

Oh wow! It's included in the stay?

VS

Oh wow! It's included in the cost?

Are both okay here? Would saying cost be impolite?

 

[Amigos4]

Yes.

 

[emsr2d2]

I'm not sure if Amigos4 was directly answering "Would saying 'cost' be impolite?" as well as "Are both okay here?"

In my opinion, it's not impolite at all. You could say:

Wow, dinner's included?
Wow, is dinner included?
Wow, dinner is included in the price/cost?
Wow, is dinner included in the price/cost?

Learners should note that normally we use inversion in questions so don't use "It is ... ?" on a regular basis. However, it can​ work when you are expressing surprise.

 

[Amigos4]

Thanks, ems! I totally overlooked the 'impolite' question! Batman45 edited the op one minute after my response. Perhaps the 'impolite' question was not there when I responded! Nonetheless, thanks for the clarification.

 

[tzfujimino]

Amigos is right. It wasn't there when I first read the original post.:-D