Mum shops at this furniture store because they'll deliver upstairs?

How to say “Mum shops at this furniture store because they'll deliver upstairs?” in Japanese

In Japanese

上(うえ)の階(かい)まで届(とど)けてくれるから、母(はは)はこの家具屋(かぐや)で買(か)うんだ。

ue no kai made todokete kureru kara, haha wa kono kaguya de kau n da.

Mum shops at this furniture store because they'll deliver upstairs? in other languages