I suggest you NOT make finger sandwiches at all. Time consuming, get soft or stale. Instead, put out 4 pounds of crackers and tiny cocktail bread slices (available at many groceries); 3 pounds of sliced cheeses, 3 1/2 pounds deli slice turkey and 2 1/2 pounds deli slice ham; mild and spicy mustard and good mayo, and let people assemble their own snacks.

chips, 3 pounds assorted
3 pints dips and salsa

fruit platter- see fruit tray page, do for 25
veggie platter- suggest you do 1/2 the classic relish tray at the top of the veggie tray page, as the pickles and olives added will be more party-ish and good with the sandwiches .

cupcakes (in place of cake) - 1 per person if all one flavor, 24 each for 2
cheese cake (my husband to be does not eat cake)
consider minis/bites- 2 per person plus an extra handful for him; I do 28 pounds whole for 100 people, so whole you would do about 8-9 pounds
mini brownies- 2 per person

You might add 2 pounds of mixed nuts and 1 1/2 pounds of mints on the table.