The total inventory value showing at the bottom of the application screen is calculated as the sum of all values in the 'Price' column, after each one has been multiplied by its respective 'Inventory Quantity'+'Amazon Quantity'.
Shipment quantities are not taken into account.
In other words:
Total Inventory Value = Price1 x Quantity1 + Price2 x Quantity2 + ... + PriceN x QuantityN
Items will be included in this calculation regardless of whether or not they are currently listed on Amazon.