I will like if someone had a website that can quote a price for different cakes shapes. Or how many people....Thanks!!
Prices are up to each individual decorator based on their overhead, supply costs, customer demographic, etc. No one else can really tell you what to charge.
There's a pricing matrix here somewhere on CC, and the CakeBoss software advertised here has that, as well, I believe.
As far as servings for cakes, I use the Wilton charts: