正值暑假促销日，请帮助顾客和客服完成一次线上购物对话吧。
阅读对话，在横线上填写恰当的单词、短语或句子，补全对话。

答案不唯一。示例：
How much is the umbrella?
It's only 20 yuan. It's cheap.
How much are the gloves?
They're 10 yuan.
How much is the coat?
It's 150 yuan.
How much are the trousers?
They're 90 yuan.
Is the scarf too expensive?
No, it isn't.
Are the sunglasses cheap?
No, they're expensive.