My team and I want to keep track of how many hours certain employees are working on a specific task or card, so we want to be able to subtract time.
For example, if someone presses the "Log in" card button, a custom field would set with the current time, and when the press "Log out" the new current time would subtract from itself. However, everything I've tried doesn't seem to be working.
I want to put the hours in a custom field, so we can use the "Number Stats" powerup to average it. If you know of better ways for averaging, please tell.
Any suggestions? Other ways to log time?