What is the name of the process in which people exchane goods without contacting eachother?

Question

This is to Type K3v!n no its not because i did not want to do my homework its because i grabbed the wrong book from my locker and its my first class so i have no time to look up the answers in my book that i left at school.

Answer 1

Looks like SOMEBODY didn't wanna do there HOMEWORK?

am i right?

Answer 2

barter or purchase orders