How do I make a report of all closed tickets, that are "billable" and not "invoiced" in a given time period?

We regularly invoice from ZohoDesk, but only once a ticket is closed. I need to be able to report on tickets that closed (maybe a ticket from last month just closed in this month) and are not invoiced yet. Right now, I can only report on closed tickets that are billable, but that shows "invoiced" and "billable" status.