I need some firewood because I did not bring enough, I was thinking I could take 2 firewood, 1 food, and 2 water. What do you think?
I can do that for you!
Ok, so you must prefer water and food over firewood. We might have lucked out as far as our priorities go!🙂
Yes pretty much that sounds like we can work something out
Would you be willing to let me have all the firewood and you could take 2 of the food and 2 of the water?
No I can't do that unfortunately./
Ok, so I could take 2 firewood, 1 food, and 1 water, the original deal, do you still want to do that one?
I would prefer the original deal
Ok, I am good with the original deal also. 
That sounds good to me.