Sum of Duration in HH:MM:SS format

[Heisenberg]

Hello All,

Is there a way to sum durations without transform it into text, so I would be able to visualize it in the "HH:MM:SS" format?

Example of the raw data:

Date	Time	Agent	Status	Duration
4/15/2018	9:04:06	A	Ready	0:04:06
4/15/2018	11:04:06	B	On Call	0:15:06
4/15/2018	1:04:06	C	Not Ready	0:30:06