Making up situational dialogue ~ How much is this necklace?

The topic of today’s dialogue practice was talking about necklace price. Based on the course dialogue, I tried to lengthen the situational dialogue and imagine how I would express it under such situation.

A: Good morning Ma’am! What can I do for you?
B: How much is this necklace?
A: It’s nine hundred and eighty-five Yuan.
B: Can I see another one?
A: Sure.
B: How much does this one cost?
A: This one costs the same as the other one.
B: OK. I’ll take the first one.
A: Do you need to wrap it in gift wrapping ?
B: Yes, please. Does the product comes with warranty ?
A: Of course. If there is anything wrong with it , you can come back and show me the warranty card of the product , and then you will surely get the free service.