I am helping a cousin with a grad party for their son. She tells me the invite list is approximately 300. It will be Sunday after church from 12:00-3:00, and their small church is invited on one invitation.

I figure most of those people will come and plan to eat pretty heartily, after that the longer the day goes on the less each guest wil consume as they will be hopping from one party to another in this rural community.

Having trouble figuring how many to prepare for. One rule of thumb is to plan on 50% of the guest list but was hoping you had a formula you like to use in a case such as this.

I would estimate the church crowd to be about 75.

Any help woudl be gratly appreciated.