Requesting a some help to calculate the difference in two times (Trickier than you might think)

Requesting a some help to calculate the difference in two times (Trickier than you might think)

I'm trying to create a cell where I can track the elapsed time since an entry was created.  This will explain more:

<Start time> < Elapsed time> <whatever>

The <Elapsed time> cell will be the difference between the current time and the <start time>.  It should update with each second essentially, as current time does as well.

Does anyone know if this is possible with zoho docs?