便宜的英语单词怎么写

例句：

这种设备比较容易安装而且用起来便宜。

The unit is comparatively easy to install and cheap to operate.

她擅长做便宜但雅致的服装。

She's expert at making cheap but stylish clothes.

还有其他一些餐馆价钱稍微便宜些。

There are other restaurants where you can eat less expensively.