+1 to pretty much everything wandering_daisy said. Well, except for the part about the crackers; agreed even there in the context of a bear can, but without a bear can I've been surprised at how well crackers can hold up.

To that I would add that with some experience at this now, I find that it's very common for people to pack too much food for the first week or so; this isn't always true, but more often than not. Very much depending on the type of food packed, I can get by with a bit over a pound of food per day in the first week or two of a trip, losing weight as I go but not painfully (I tend to be in the 170# - 180# range starting out).

After a few weeks of hiking I need over 2 pounds of food per day, cleanly double (and could eat more) what I started out eating, after body fat is reduced and metabolism cranked up. Depending on how lean you are to start, this might or might not start happening to you towards the end of a 2-week trip, but I wouldn't worry about it.