Calculate Volume from Flow Rates

[wobble12]

This is probably easy, but brain not seeing it.

I have a list of flow rates (example below), which are measured every 10s of seconds. The data is taken from a flow meter, and units are in m3/hr.

I would like to calculate the volume between two times, so for example:

08/07/2020 02:57​	12.71​
08/07/2020 02:57​	14.65​
08/07/2020 02:58​	14.99​
08/07/2020 02:58​	16.87​
08/07/2020 02:58​	17.21​
08/07/2020 02:58​	17.46​
08/07/2020 02:58​	19.17​
08/07/2020 02:58​	19.46​
08/07/2020 02:58​	19.28​
08/07/2020 02:58​	19.28​
08/07/2020 02:58​	20.41​
08/07/2020 02:58​	20.75​
08/07/2020 02:58​	20.75​
08/07/2020 02:59​	21.11​
08/07/2020 02:59​	22.23​
08/07/2020 02:59​	24.36​

What formula(s) would I need to do this?

 

[Perpa]

Volume =( ((Flowrate1 + Flowrate2)/2)/3600)*10sec

 

[wobble12]

Thanks