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- 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