If you're looking for a report that will tell you which items have been sold from your POS within a specific time period that you select yourself, you will find it by going to:
Left Side Menu Bar > Reports > under Financial page > Items Sold
Under "Items Sold" page, select the date range and click "Run Report".
You'll see all the invoices that were created from the POS, items they were selling, date they were sold, and how much they paid.