Setup Overage Traffic Billing for CDN

I have a package for $10/month.

Can I say that the user can use 2 TB - if they use more than 2TB in the same month, they have to pay .08 cents.

Setup package to use Metered Billing.
In Settings → Products & Services → Product Configuration under "Price" - select Metered
Enable Traffic billing variable
Pricing Scheme set to Overage
For the first tier set Start QTY to 0, End QTY to 2000, Unit price set to 0
For the second tier set Start QTY to 2001, End QTY left blank, Unit price set to 0.08
Billing Type set to Post Paid
Generate Invoices set to Monthly
Fixed Recurring Fee set to $10

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