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The bulk update tools are all found in the Tools section of the Item Management menu.
Inventory Allocation
UltraCart tracks the inventory allocation by taking the configured quantity in stock, then deducts from the qty in stock this way:
Allocated to CS (Shopping Cart) - This allocation is a temporary allocation to active shopping cat sessions.
Allocated to PO (Placed Order) - This allocation is to placed orders that have not yet been marked as shipped (reached the "completed" stage)
Available to Allocate - This represents the QTY in Stock minu the allocated inventory for the SC and PO. This is what is av available at the present time.