I was thinking that maybe i could get two waters and you get one. I need more water because i forgot some at home. what do you think?
I can give you two waters if you give me 2 firewood. I don't have firewood to cook food.
okay i can give you to firewood and i can take 1
I think that'll be great. 
okay so could get 2 food packages?
I can give you all that if you give me more firewood?
so if i give you 3 firewoods you will give me 3 food packages?
Yea
okay so that will be i get 0 firewood you 3, ME 3 food packages and you 0. Me 2 waters and you 1.Do we have a deal? 
I like that deal. is that okay with you?
yes it's a deal