Hello, could you help me calculate the Argo Smart Routing charges?

Hello, could you help me calculate the Argo Smart Routing charges? I just signed up for Argo Smart Routing yesterday at 21:00 and disabled it at 10:00. So, the duration it was active is 13 hours (21:00 - 10:00).

I found that during the 13 hours I had Argo traffic with a cumulative total this month of 6.21 TB. According to the cost table:

Expected Traffic, Expected Cost (Per Domain)
1 TB (1000 GB) = $104.90

Therefore, for 6.21 TB:
Cost = 104.90 * 6.21 = $651.429

Do I need to pay $651.429 for the service this month, considering I only used Argo Smart Routing for 13 hours? Can you clarify if there’s any way to reduce the cost? Thank you.