[PyQt] [Solved]Multiply a number to a DoubleSpinBox

[Extra]

Got it.
I'm now able to delete a selected row.

This is what I did:

    #RemoveItem Function
    def RemoveItemClicked(self):
        #Print in terminal for testing:
        print("The Delete Item Button was clicked")

        #Delete Items from the Inventory
        index = self.InventoryDisplay.currentIndex()
        NewIndex = self.InventoryDisplay.model().index(index.row(), 0)
        print('Index is :',NewIndex)
        indexID = self.InventoryDisplay.model().data(NewIndex)
        print(indexID)

        connection = sqlite3.connect("inventory.db")
        cursor = connection.cursor()
        cursor.execute("DELETE FROM items WHERE id = ?", (indexID,))
        connection.commit()
        connection.close()