What is the average cost of a nose job to fix the bridge of a nose hump and a bulbous tip?

I would recommend starting with a consultation with a board certified facial plastic surgeon that specializes in rhinoplasty surgery to discuss if rhinoplasty can address your concerns. 
I would recommend writing down the following questions before scheduling your consultation:
1. Are you unhappy with the tip of your nose? 
2. Do you feel that your nose is too wide? 
3. Do you want to make your nostrils smaller in appearance? 
4. Are you looking to decrease the general size of your nose?
I hope some of these questions will help you pinpoint what it is that you don't like about your nose.  Cost will vary due to various factors like anesthesia fees, facilities fees, etc. I wish you the best as you research your options when scheduling a rhinoplasty consultation.
Sincerely,
Philip J. Miller, MD, FACS Double Board Certified Facial Plastic Surgeon

Cost of rhinoplasty vary by surgeon and by geographic location.  Roughly you can expect to pay between $7 to $5k.  

There is quite variation in the prices for rhinoplasty. Different surgeons charge differently and it also varies from state to state. In Midwest it is about 6k-7k 

In general rhinoplasty is around $7000-8 for everything. Be sure to see a board-certified plastic surgeon who does rhinoplasty regularly. Hope this helps!