Grafana with Google Cloud Datasource Plugin

I am trying to explore solution for my client using Grafana Cloud using Google Cloud monitoring and logging plugin. For this i need to provide cost estimate to client. What I read in Google cloud plugin doc that log data will be stored in Google cloud bucket and queried from grafana. In this case does Grafana charge for log storage? or only Google cloud storage will cost.

You can find exactly how Grafana Cloud calculate log costs here: Understand your Grafana Cloud Logs invoice | Grafana Cloud documentation

The pricing page is here: Grafana Pricing | Free, Pro, Advanced, Enterprise