Calculate Duration IF gap no more than 15min between values

Hi,

 

I`m trying to calculate the duration of a column (inputTime) but not sure how could I limit it to calculate all entries that are less than 15min apart.

 

example:  In the below column, there has been a gap of more than 15min between entries, what I would like to achieve is that when calculating the whole duration, the expression can identify the gap and calculate only entries with less then 15min.

 

Could anyone shed a light on this?

Many thanks

 

10/03/2022 00:05:45
10/03/2022 00:06:26
10/03/2022 00:06:39
10/03/2022 00:11:16
10/03/2022 00:11:43
10/03/2022 00:13:52
10/03/2022 00:14:29
10/03/2022 13:16:36
10/03/2022 13:17:37
10/03/2022 13:17:56
10/03/2022 13:18:12
10/03/2022 13:18:38
10/03/2022 13:18:57
10/03/2022 13:19:28
10/03/2022 13:20:03
10/03/2022 13:20:11

 

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