On-hand inventory values of items per month basis can be reviewed by customizing the Inventory valuation standard report.
Open the Inventory valuation report by
Report> Inventory/ Items> Inventory valuation

- Click Edit Columns Tab.
- Add the column Quantity On Hand: Quantity On Hand and set an Alternate Date range.
- To add another column for another month, repeat step 3.
- Uncheck the Add % of Total Column if the customer does not want to see this column.
- In case the customer wants to have the inventory values as well, you can add the column Quantity On Hand: On Hand Value and set the Alternate Date Range.
- Click Save or Preview.