Anna has a yard full of chickens but needs milk for her baby. josiah, who is allergic to eggs, has a cow that produces milk. put the events in order to describe how anna obtains milk by the barter method.

Anna needs milk and she has eggs. Josiah has milk but he can't eat eggs (because he was allergic).

So, Anna can't trade the eggs to Josiah directly. In this case, Anna needs to find someone that can accept eggs and gives things that accepted by Josiah.

If Josiah says that he wants apples, Anna can trade the eggs with someone that has apples. Then, Anna can trade the apples with the milk.