I have been going back and forth , for example I am making an 8 inch, 6 inch tiered cake with a 4 inch foam tier on top. Charged 118 it will be covered in ganache and fondant decorated fireman theme with a gumpaste fireman and dog . She had a hard time because didn,t want to spend that much. So I thought of the foam tier to make it look bigger and just charged 10$ more for that since the foam cost me 4$. I live in Sacramento area.