If you need to know the value of your parts stock at any time in the past you can do this by running the Part Profit Summary Report.
To run the report you need to enter a From and a To date, then click on Preview.
The report will show the profit of all parts sold in the period (both parts invoices, and parts invoiced as part of a service job).
The report will also show the value of your opening stock (based on the From date of the report) and your closing stock value (based on your To date of the report).
