How can I clear an item's unit price in a quotation in V5?

1. In the quotation's item list, find the item you want to change and click its "Unit Price" cell to edit it inline. 2. Delete the existing value and press Enter to save. To cancel the change, press Esc. 3. After saving, check "Unit Price" and "Subtotal". In this test, after the value was cleared, the unit price displayed "USD -" and the subtotal displayed "–".