How much do I buy?

1 cup graham cracker crumbs = 14 squares 1 cup chopped carrot = 1 large carrot 1 cup chopped onion = 1 large onion 1 cup chopped sweet pepper = 1 large pepper 1 cup chopped tomato = 1 large tomato 1/2 cup diced celery = 1 large rib 3 Tbs. sliced scallion - 1 large scallion 4 tsp. chopped garlic = 1 large clove 4 cups sliced raw potatoes = 4 medium-size potatoes 3 Tbs. lemon juice -= 1 medium lemon 2 tsp. lemon zest = 1 medium lemon 2 Tbs. lime juice = 1 lime 4 tsp. orange zest = 1 medium orange 1/3 cup orange juice = 1 medium orange 1/2 cup mashed banana = 1 medium banana 2 cups sliced strawberries = 1 pint berries 1 egg white = 2 tsp. powdered egg whites + 2 Tbs. water 4 cups sifted flour = 3 1/2 cups unsifted 1 cup soft bread crumbs = 2 slices fresh bread 1 cup bread cubes = 2 slices fresh bread 2 cups shredded hard cheese = 8 ounces cheese