How can my Yahoo Store automatically display an "Out of Stock" message for items with zero inventory?

I want the "Out of Stock" message to display automatically on the product page without manually toggling the "Availability" variable. As it is now, the "Add to Cart" button always appears whether or not the inventory for that product is zeroed out. I want the "Add to Cart"... show more I want the "Out of Stock" message to display automatically on the product page without manually toggling the "Availability" variable. As it is now, the "Add to Cart" button always appears whether or not the inventory for that product is zeroed out. I want the "Add to Cart" button to only display if there's inventory available. Any help, Y! Small Biz?
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