What will be the approximate cost/fine for a first time speeding ticket + traffic school?

I was written down at 75 in a 65 zone(15 north freeway in California near Mira Mesa). This is the first ticket I have ever gotten and was actually the first time I was ever stopped by a chp officer. I'm not sure if this would affect the cost/fine but I am 19, almost 20 and am currently going to college.