I just started taking classes and decorating cakes and I done my first one last night, its a pink ribbon cake. A friend of mine saw it and wants me to make one for them, but a purple ribbon. I'm not sure what to charge. Any ideas? Its the ribbon pan that wilton makes so i'm not sure how many people it will serve. The cake is 15x8 at its longest and widest points.Here are pics of the pink ribbonI know I need to smoothe out the white icing more and do better with the...