I see these “Sponsor-a-child” advertisements on TV often, especially right now. They claim it costs only 80 cents a day to feed a child. What are they feeding them that is so cheap?
My WAG: The economies of scale. While $.80 might not buy enough for one kid for a day, $8000 might be enough to buy a decent amount of cheap food in large bulk for 10,000 kids.
I have no clue how standard this is (I searched for ICRC/RC figures first, but found these along the way), but it is a single “Displaced Families Programme” food package. There was no data on how many people it was meant to feed, or for how long.
Please leave out political differences with this particular organization. It is an example only.
The page notes that it distributed, for an example, 50 food packs at weight 23.5 kg each on 27.11.00 to Beit Lahia, covering 350 people.
The mention:
So I suppose each “family” is 7 people (likely mostly adults)… But it still doesn’t tell us how much each package costs or how long a 25kg package would feed a family of 7.
…
Anyone know how long 5 lbs of rice and 3 lbs of beans and lentils would last a family? 
I know that while I was in the Philippines I could buy a meal at a restaurant consisting of rice, barbequed pork and a soft drink for less than a dollar. Food is much cheaper in other countries.
You could even buy a McDonalds value meal for only a dollar.