Hello how are you?
Hey there fellow camper! I am great! How are you?
I'm doing well and very excited about my camping trip.
Me as well. What item is your greatest priority for your trip?
Firewood and my second priority is water.  I'm open to negotiating though.
Glad to hear because I really need firewood and food. What do you propose?
I can give you 3 packages of food but I really need the additional firewood.
I like that. How about 3 water for you and 1 firewood?
I can give 3 packages of food and 1 water.  
So 1 firewood, 0 food and 3 water for you?
No 3 packages of firewood, 1 package of water, and I can give you 3 packages of food.  I need the Firewood the most.
Tell me why you need so much firewood?
I have other people coming with me and we don't have insulated sleeping bags.  The temperature also drops drastically at night.
Well i need at least 1 firewood so we have to make that work
How about this I get 2 packages of firewood and 2 packages of water.  You can have all my packages of food. This will be a hunting camp trip for me.