'Use as Est Cost' option not available when creating new stock item

When you click the 'New' button in the Stock Items 'List' tab, a new item entry pop-up window will display.  If the item you're creating is a purchased item, you will set the default supplier here.  If the supplier is not set up for foreign currency, then a 'Use as Est Cost' option will appear, which allows the Estimated Cost of the item be set in this window.  If the supplier is set up for foreign currency, though, then this option will not be available because a translation must occur.