I charge for supplies and $30.00 for each hour spent decorating. For something like that I'd charge $200.00. That gives me supply money and 5 hours baking and decorating time. Delivery would be extra. A 2D lay down cake that requires carving is not that much easier than a 3D.
Thank you very much for your help.
Remember too that Iron Man is a copyrighted image.. as are the Power Rangers and all that jazz. Technically you can't sell a cake like this.