What are batches?

When fulfilling subscription boxes or crowdfunding orders, we set up an assembly line to kit “batches” of orders.
A batch is a unique set of orders that have exactly the same combination of items in them.
In order for the assembly line to be effective, there needs to be at least 50 orders in each batch. If not, there is a $15 batching fee to compensate for the lack of orders in each batch.