Total value of inventory?

You can find a lot of samples if you search for REPORT COST DETAILS tag. Latest one I’ve prepared is this one…

You can create footer summaries for any report by using (.sum) feature. If you prepare your desired report and paste your template here I can show you how you can add this.

If you think doing it by yourself will be better to understand how it works you can review this post to see how I’ve added summary for Person column.