Work out cost of ingredients for cake, icing, fondant, board, boxes/packaging. Then figure out your time making cake, icing and decorating. Time to create decorations. Then make sure that is at least covered. Pricing markup depends on your area however. If possible find out how much local bakers are charging.
Miranda, Rocket Cakes, https://www.facebook.com/pages/Rocket-Cakes/389591004470910
