I have been asked to sculpt a slingshot race car cake for a graduation party and I have never done anything like this before and I do not know how much to charge to do it?? I did a basic 3 tiered cake for her niece's party and she saw that cake and I was paid $100 for that cake. I know that I can not make this car cake for that price but I don't know how much higher I should go? It would be covered in fondant and probably take me at least 3 days to do..any suggestions....

Well, are you talking about this? http://www.cannockmotorsports.com/FWThumbnails/DSC_1085-2.JPG

That's the only thing I see that comes up on a Google search for slingshot race cars. How detailed? Exactly with pipes and 3D fins and everything? I would start at about $300 and go from there. Depends on how big. I'd recommend GP for the panels and fins, maybe even pastillage.

Yes that is the exact car I was talking about...thank you so much for posting a reply. I was thinking gum paste for the fins also. I was not sure as to how detailed I was going to be able to be but I just needed someone else's opinion about how to go about pricing this. Thanks so much