“i will give you this food for that food”
“my food is better than your food, so i will give you my food for two of your food”
“i only have one of my food, so can i give you one of this food now and some copper later?”
“sure but i need something to guarantee that you will give me the copper later”
“i will give you this stone tablet recording my debt to you and you can send your servant to receive the copper at a later date, good?”
*a few days later*
“this copper is of poor quality! and my servant was treated rudely! i will NEVER buy copper from ea-nāşir again!”
