Hi there, what are you looking for?  I really need extra water and food.
Hello. I prefer food but firewood is important. I wouldn't want us all to get cold.
Okay, sound good.  Would three packs of firewood be good to you if I can get 3 things of water and two food?
That actually doesn't sound too bad. I could use the firewood to make us cozy. One food to tide us over. 
Okay, I have a pretty big appetite, and plan to do a lot of hiking, so the food and water would be well used by me.
Absolutely. Everyone looks for different things on a camping trip. I'm glad our needs seem to intersect.
So, what is the final deal we are striking here?
3 firewood for me, 1 food, no water. 2 food for you, 3 water for you, no firewood?
Yes, that sounds good to me, looks like we have a deal.
That sounds great. Thanks!🙂