I have searched the internet to determine the number of servings for a "party" cake for approximately 75 people. I have probably viewed about "75" different answers. Can anyone please tell me about how many servings I might expect to get from a 10" round, an 8" and a 6" round? Also, how many servings might I expect from a 12" square and a 9" square? I'm thinking the serving sizes will be about 1.25 inches. Does this sound like a fair slice of a party cake? I appreciate your input.