title: Sum function is missing at the bottom right of the sheet
body: <p>I use google spreadsheet and I need a total of time (in <code>hh:mm:ss</code> format) while selecting multiple entries using the sum function. It seems the sum functionality was working earlier and now it got disappeared. Please see the below screenshot.</p>
  
  <p><img src="https://i.stack.imgur.com/n1A6i.png" alt="Google spreadsheet"></p>
  
  <p>How to get it back? Please help me.</p>
  
  <p>**Google has restored this feature.</p>
  
  <p><a href="https://i.stack.imgur.com/FUYiV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FUYiV.png" alt="enter image description here"></a></p>