Why are there extra $20 in one-time charges and credits?

Hey ​@zheng.lll, thanks for reaching out! The one-time charge you’re seeing is likely the prorated cost of the new Full seat.
One-time charges in this case are more likely for a new Full seat that you added in the current month. So it’s just prorated costs of that seat in the current month.

If you need a precise breakdown of your charges, our support team can take a closer look at your account details.

Let me know if I should get you connected to them! 

Yes, I need a detailed breakdown of the expenses. Please help me contact .

You can contact me at [redacted by forum moderator to remove PII]

Hey ​@zheng.lll, I’ve just created a support ticket on your behalf. Your ticket number is #1672183, for reference. Someone from the team will be in touch with you soon to give you a detailed breakdown of the charges. Appreciate your patience in the meantime!