Building e-Learning platform. How many licenses do I need?

[ShotaMegre]

Hello!
We're building the e-Learning platform with about 30 teachers available for group courses held online via Video-meetings.

How many licenses should we purchase to be able to run 5 team meetings in parallel with 5-10 participants in each group?

Some more details:
1) We plan to build the platform using Moodle open-source code.
2) All the courses should be organized using the website engine upon purchase of the access by the participants (one teacher and 5-10 participants in each group).

Can't get the answer from Zoom sales for an unknown reason.

Thank you!

[IP-Man]

@ShotaMegre 

Kindly see the plan/pricing differences for Zoom on below link.

https://zoom.us/pricing

To get a hold of sales team, I would suggest that you log a request with Zoom Support at
https://support.zoom.us/hc/en-us/requests/new. They may be able to help or point you on the right directions for your concerns.

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[ShotaMegre]

Thank you for your reply!

Unfortunately, it doesn't address my concern. 
My question is "how many licenses do we need to be able to run 5 consecutive video sessions with 5-10 participants in each session?"