I would like all 3 of the waters because we are planning a long hike and I'm worried my children won't have enough water in this heat. 
okay awesome.  what are you willing to trade
I don't need much food so you can take the food.
oh nice okay 
Do you have any preferences of what you need?
i would prefer food and firewood is last on my list 
Great what if you take all the food and we figure out how to split the firewood
yeah of course.  that works for me.  ill give you plenty of water 
Great - how many firewood do you need?
1 is fine.  id love 2 to three packages of food 
So what if I get all 3 waters, and 2 firewood - you take 1 of the firewood and all 3 of the food? Does that sound good to you?
yeah that is something i can most definetely get down with.  i like that arrangement