That depends on which Statistics Levels you have defined on your vCenter.

See PowerCLI & vSphere statistics – Part 1 – The basics for more details.

Thank you for your fast reply

I already put it on Level 3

It still gives the average, Im not sure how we can get the total usage of VM in 30 days.

Should I calculate something to achieve the total traffic usage of VM? or there is a better way?
The purpose is if a VM used 2TB within a month, we should suspend the VM.

Your interval 4 is still at level 1, so your level 3 for intervals1, 2 and 3 will get aggregated.
Statistics are based on averages over an interval, to measure the total amount over a month you will need other tools

Hey,

Alright thanks, but what tools?
I already tried VEEAM ONE and it shows the same data as vcenter!
Do you know any tools?

Have a look at VMware Aria.