If you have a smart phone, download Cost a Cake Pro, I think it costs only a few quid. It takes a bit of time to set up, but I use it all the time to price my cakes, you add all your recipes into the app, along with extras, like cake boxes, boards, icing etc., then there is also an option to add an hourly rate and calculate the hours spent on the cake, the app then tells you the total cost x
