How do you say

I bought a new sofa at IKEA last week.

..in Chinese?

我上周在宜家买了一张新沙发。

wǒ shàng zhōu zài yí jiā mǎi le yī zhāng xīn shā fā 。

How do you say "I bought a new sofa last week, which is very comfortable." in Chinese?