There is an app for iPhone/iPad (don't know if it's available for android) available for purchase called Cakeulator. I got it a few months ago and am still going through the process of adding ingredient prices (it comes preloaded with prices on many items but I don't know how accurate they are so I prefer to update the prices myself with what I see at my local grocery store.) I have priced (but not actually sold, since I am not a business) the past few cakes that I have made, like the ones for my own kids birthdays and such, just to see what I should charge if I was in business selling to someone else. I realize this app is far from perfect, I have even emailed the creators with things I didn't like about it (in a nice way I hope, at least that was the intent) in hopes that maybe they can fix those things in a future update. It is pretty eye opening though how much a cake *should* cost. When I get my business started I think I would like to purchase cakeboss, but since I can't sell my cakes yet that is too big an investment at the moment. The Cakeulator was only $6 or $7 I believer and it might be beneficial to some others just trying to begin to figure out how to price their cakes.
I hope this helps someone!