Hello, I would like to have three packages of food. We've decided to stay an extra night but need more food to do so.
I would be open to that if you could give me three packages of water 🙂
Hmmm...I'm pretty muddy due to clumsiness, so I may need one extra. I could give you two waters and all of the firewood. What do you think? 🙂
So are you suggesting that I would get 2 waters, 3 firewood, and no food?
Right! Well, beyond the food you already have. 
I have an extra person camping with us that I didn't expect when I bought food, so I could use one if you're willing 🙂
I understand that! I wasn't expecting to stay an extra night, but the weather is too perfect to leave. I can manage with two packages of food for sure. 🙂
Great!  Thank you for being so understanding!
No problem! So are we in agreement that I get 2 food, 1 water and you get the reverse? I could also probably use one firewood, but it's not as important to me.
I can give you one firewood, so I'll be getting 1 food, 2 water, and 2 firewood?