Welcome to the forum. This is the most asked question on cake forums. Unfortunately, we can't tell you how much to charge because there are too many variables.
Here's a superb article by the company that makes the CakeBoss software that explains the process of pricing custom cakes:
Thanks AptI! Really appreciate!
I am having the same problem too! I am making cakes from home and dont know ewhere to begin in charging for my cakes. I live in Ontario, Canada and everyone seemd to price either per slice or for the entire cake. I am lost. I just did a dummy cake, 4 tier simple cake with fondont and diamond wrap on each tier and rose at the top...what would I charge for something like that. HELP!!!!