How much is it to replace a gauge cluster on a 2002 Mazda Protege?

I have a 2002 Mazda Protege and it constantly beeps at me and the gauges on the dash go nuts. I Never know how much gas I have and my heat gauge goes from hot to cold and back to hot all the time when my car is at a normal temp. Is it hard to replace? How much is it to replace? What do I do? I have no idea! Thanks! 10 points to the person who helps me to get my car to shut up and act normal.|||$549 including labor