Argo Smart Routing Billing Inquiries

Argo Smart Routing Billing Inquiries and contacted the support team, but did not receive an accurate answer.

If the total cache usage per month is about 80TB, can I know the monthly payment fee if I do 72TB*104.9USD?

I’d like to estimate the Argo Smart Routing monthly fee.
However, the 1GB usage alarm arrives in 3 days, so I wonder if the above policy is correct.