Hi JosephE , can you pick a good example of a product with this issue, then run the item register detail report for a suitable (long) date range to Excel, and add a column for the unit cost of each transaction. If possible, pick an item that you can report from its beginning in the file
1. Does the report agree to the screen register?
2. Does the change in unit costs provide any clues?
(Sales transactions pick up the average cost/unit from the item information at the time the sale is recorded).
Do you use multiple locations?