Assuming that each piece of furniture is logged as a separate record (or at least groups of the same furniture item from the same manufacturer make a separate record), a Summary report can give you a break down by manufacturer, type of furniture, or both. The individual records do not need to be listed in the report unless you want them. It can just list the subtotals for each group of records.
You may find this tutorial on summary reports helpful: Creating Filemaker Pro summary reports--Tutorial
I've played with the summary reports before, but until your comment prompted me to look closer, i had always just passed them off!
Thanks so much for all your help over the last few months!