I'm just working out how much food to make for Abbey's Dedication afternoon tea and need some help please!!! We are going to no fuss option as I think we'll be too tired after the car trip from Vic to SA...

So far the food is consisting of;
Sandwiches
Butterfly Cakes
Lamingtons OR Profiter Roles
Cake

My Question is, how many sandwich rounds (half a sandwich) would you make per person? It is a 2:30pm service and will go for approx 30min....

TIA

MG