Okay, her birthday is January 9th so I'll bring her in a couple days after her birthday. But how much would it be in total for the piercing?

So how much would a nose piercing be? Including the jewelry

It depends on the piercing and you also have to factor in the cost of jewelry. I had my lip done there for about $70 with jewelry included and about the same for a tongue piercing. They do seem to have a variety of jewelry available at different prices. I got the cheapest, which was a stainless steel ball.