In that case, I don't know how you could have made $80-90 profit. Crystal banding is expensive. Did you add cost of structure support, buttercream, frosting, fondant, pearls, cake boards, cake drums? If you are legal, did you add the yearly expenditures of license & insurance?
Don't mean to be kicking sand, but that's a high cake to liking ratio. I'm assuming you mean 3" cake, filling, & 3" cake. In my opinion, way to much cake & not enough filling.