By my calculations, she'll have 36 servings of cake. She's having other desserts and she didn't think all 40 people would show up, so this is the size we agreed on. She doesn't like fondant covered cake which is fine by me because I hate covering cakes with it. I asked about separate cakeboards but she wants them all on one. I'm just going to put separate boards under each and then someone stick them on the board.