Item Sales Report Sorting

I need to find a way to generate a report that shows how many times an inventory item was invoiced over a given period of time, and I need to sort it by the Sales Rep on the WO/Invoice. I am working to make sure stock items shipped to one of our locations are all being billed. So for Item 000000, from Date X to Date Y, I need a list of all the times it was invoiced, and I would like to be able to sort by Sales Rep. Is that possible?

Any help is much appreciated.