I made this cake 10" bottom with a 6" top. Each tier was 4 layers so 3 fillings on each tier, 2 filled with chocolate mousse and one with custard.
What would you charge for it?
It was for a 40th anniversary and we delivered and assembled it on site. We had to put it together in the garage as they had no room left for us to work inside the house....
$999. I price less than Charm City in order to remain competative. 
Seriously, though here's ALL you need to take into consideratoin:
1) cost of ingredients including shipping or gas + wear and tear on your vehicle to go to the store
2) cost of utilities used while making and decorating: electricity, gas, water.
3) how long it took you x how much you want to make per hour
If you know that, then you can figure out how much to charge for ANY cake.
I agree..You need to have your cakes looking a little more professional before you offer them to the paying public.. 
Good Luck also!!
I have been decorating for nearly 10 years and I am still learning something everyday! Many have been decorating for 30+ years and still are learning..Alot is natural talent.Don't be discouraged though...Practice..Practice..Practice..makes perfect!! 
I think you have done a nice job on your first tiered cake, especially having only been decorating for one month. I feel that about $150 is a fair price (in my area anyway) for a cake of this size. However I honestly do feel you need a bit more practice to command that price tag. Besides the ingredient cost and time factor, I think that skill level and experience are what really what should dictate your price. Good luck 
Thank you everyone for your comments. I totally know the cake was not perfect and I need lots of practice. Starting classes and will practice practice practice. I was happy with it as our first tiered cake, but want to be much better at it and I know what that takes.
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