I am just a hobby baker so not sure if this is pricing my cake way under but I come up with a price by figuring out what it costs to make the cake recipe and up charge that by 10%. I then add in all the materials I use such as boxes, boards, fondant and such. To me I am not trying to make a profit on these items. I then add in an hourly wage for myself. I try to figure out how long a cake will take me. Sometime I guess right and so,etimes I am way over but then I know for the next time I need to do a similar cake. :) I hope this helps and gives you some kind of idea.