I price by the cake, here are a couple of reasons why: http://acaketorememberva.blogspot.com/2009/11/how-i-price-my-wedding-cakes.html
I read that and I dis-agree completely. I don't count serving portions differently from party cakes to wedding cakes because of that reasoning............everyone cuts a cake differently. Instead, I choose how much cake to make per person depending upon the cakes design. So, my servings are all within the charts recommendations, then I error to the heavier side in choosing my cake pans/portioning's. So if anyone questions me, it's their fault when they didn't get the right count out of the cake because I gave them more then the charts say. That little bit more cake really isn't costing me as much as my time stress, dealing with people nickel and diming me or me wasting my time trying to get people to understand why a wedding cake slice is smaller then a dessert cake.