Hello fellow bakers! I need some professional advice on how to price my cakes. It's my hobby; I am working on getting my license. My friends have started asking me to bake/ my pricing on my cakes. I have done the math regarding how much the ingredients cost me.

This 8-inch cake (4 inches tall) is made from sponge cake layers (10 eggs, 3 cups flour, 2 tsp baking powder, 1.5 cups sugar, $5). The icing is Italian Meringue Buttercream (5 egg whites, 1 1/4 cups sugar, and water, $6.90). I also added some raspberries inside ($3). Decorated with chocolate ganache (chocolate is $3 and heavy cream 1 cup is $2.50). Decorations are chocolate covered strawberries ($1 each approximately) and fresh flowers ($6.50). Cake board is $0.50. Total invested is $32.40. 

What's the average "retail" price of a cake like this?