Hello APEX-Community,
I have 3 Items: Start (Date), End (Date) and Total (Number).
When I click the Start-Button, i save the current timestamp in the start-item. When I click Stop, i save the current timestamp in the end-item and calculate the total time.

Now to my problem: After I saved a total time, I want to click start and stop again and save the totaled up time with adding the last saved number to it. At the moment I just overwrite the old total time.
How would you guys solve this problem?
Greetings
Alex