The Formula Bar should show:
=SUM(E4:E5)
TIP: This is just a different way of adding numbers. By clicking the 
icon, you told Calc to SUM the numbers from E4 through E5.
The Formula Bar should show:
=SUM(E4:E5)
TIP: This is just a different way of adding numbers. By clicking the icon, you told Calc to SUM the numbers from E4 through E5.