Returns what quantity more units of meter would add to your current billing period, priced at your organization's own rates, on top of the usage it has already recorded this period, and after your subscription's coupon.

Use it to plan volume before you act: an estimate is free and charges nothing. The charge itself is decided when the action runs and appears on your invoice.

A project key cannot read it (403): the price depends on the whole organization's usage this period. Use an organization key.