I wonder if they used the official exchange rate or the black market one
It's the price for 100 Mbps. You can pay for as low as 5.
That's if you pay in local currency. They have "promotional" packages in US dollars at $150 for a 100MBps line.
I used to be quoted that for 20MBps and even 8MBps! these days it's a bit better since you can get that for about $150 if you're lucky enough to be near a fibre line.
100Mb/s continuously utilized is 100MB * 60 * 60 * 24 * 31 = 33 TB. AWS egress is $50/TB.
AWS is a perfect comparison because they are also crazy expensive for egress. You get 10 Gbit/s for around 600$ in every NA and European datacenter.