Bandwidth usage

hi all, thanks in advanced for your support.
i have a question regarind openvidu bandwidth, expecially from OPENVIDU to CLIENTS.
i try to explain in a simple words.
i need to calculate a network costs (AWS cloud) for my client that need to make a call with: 1 or 2 publisher and 200 subscriber in the same session.
how much cost 1 hour of this kind of call? wich is the formula that i need to use to calculate? please keep in mind that outgoing traffic from AWS costs 0,09$ each GB
wich is the correct cost if i use default value of openvidu (1000kpbs upload and 300kbps download) ? and if i use half value (500kbps and 150kbps)?
thanks for your help, i hope you understand my question