Treatment. 1  Usually does not require treatment. 2  In most cases disappears on its own by age 30. 3  Intensive moisturizing is the first line of treatment. 4  For more difficult cases, use of medicated creams with urea or alpha-hydroxy acids.
nearly 100% of your guests will eat the cake. The lady making our cake said 50-70% will eat cake. In the asian culture we serve a ten course meal. From experience I haven't seen many eat cake.
I'm presuming you mean the typical Costco celebration cake, the kind you might get personalized for a birthday or graduation party. Michelle Tarver's answer is correct for that kind. It's a half sheet cake, finished at about 12 x 16 which they state serves 48 people, with each person getting a generous 1 x 4 slice of cake.