Why is Report Designer only able to calculate the Tax 1 amount per copy?

Symptom
Resolution
  1. Add the new Copy Number object (installed with the latest release of Report Designer) to the report, this will ensure that every copy is recognized as a unique item.   
  2. Essentially, you need to make the report specific enough so that  all items/copies have their own line.
Additional information

More information on Copy Number

Page ID
17313