Hello there. I
Hello!
I'm interested in making a deal with you on the packages.
I think that I have some opinions about what might work best for me and be fair for us both. What is the most important to you out of the three items available?
I need water the most. What do you prefer?
Water is also important to me, but I think that a large amount of firewood and food could also benefit me as well.
I see. I don't need firewood that much. Would you like to take all of it so I can get more of the food and water?
I would still need a bit of food, but yes the firewood would help me
🙂 Great! Take all the firewood then. Then I'll take a greater share of the food and water.
No, I will still need more food. 
You drive a hard bargain. 😮