Report Boolean to filter zero value

I've added a Boolean to the Request Form in the "Inventory to G/L Reconcile" report. When the Boolean is checked, I would like the report to display only items with a zero "Inventory Value". The InventoryValue field is an existing calced field on the report.

I can't seem to code this properly and the Boolean doesn't filter when checked. It should filter on 0 Inventory Values, but I cant get it to work. Any ideas?
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