View Chart: Clicking the link for View Chart will show a bar chart of the last nine months of sales (similar to the bar chart from Item Detail Analysis).
The last tool in the Item Details toolbox is the Change History link.
Clicking this link will bring up the Item History window
This window shows cost and price change history by date. It also shows where the changes were made (Item Details, Mass Updates, or from an invoice) as well as the login that was used to make the change.