Cloudflare Workers Durable Objects Duration Billing Alert Units

Hi! I'm trying to create a Usage Based Billing Alert for Cloudflare Workers Durable Objects Duration. However, there is no unit in the input box. According to the docs (https://developers.cloudflare.com/workers/platform/pricing/#durable-objects-billing-examples) the included limit is 400,000 GB-s. I'd like to get notified when it exceeds this limit. Do I need to enter "400000" as in GB-s or "400000000000000" as in B-s?

Pricing · Cloudflare Workers docs

By default, users have access to the Workers Free plan. The Workers free plan includes limited usage of Workers, Pages Functions and Workers KV. Read …