If you'd like to see which items are 'In Stock' within a custom date range all you have to do is navigate to the Inventory tab and put in the dates you'd like to search in the range you desire.
Once you've set a date range, you'll want to ensure you have your Custom Columns set up with the columns below.
In Stock (how many you have available to be added to projects in this range)
Quantity Booked (how many are added to signed contracts in this range)
Max Needed (the highest amount needed on ALL projects in this range)
Add more columns to find out which items are booked most frequently, Gross Revenue, and more! Learn more here.