Go to Management > Reports > Top X > Top X Customers.
Select the date range and number of top x customers. You can order this report by either sold value or profit.
In the Stock area, you have quite detailed choices to make, and you can report by individual account manager as well as including labour costs.
If you click Save, this report will be added to your management reports for future use.
Once all selections have been made, click OK to produce a Jim2 report.
From within this screen, click Print. This will allow you to either print the report, or save it as a file.
Further information:
Stock Valuation by COGS Report