Store sales and tax records for infrequent auditor access for >=10 years at lowest cost. Which services should be used?

Google Cloud Storage Coldline is designed for data accessed less than once a month, making it ideal for infrequent auditor access and offering the lowest storage cost among GCS classes. The 10-year retention requirement aligns well with Coldline's cost-effectiveness for long-term archival. gsutil is the standard command-line tool for interacting with Cloud Storage buckets and objects. Nearline is for data accessed less than once a month, but Coldline offers lower storage costs, which is a key requirement. Bigtable is a NoSQL database for large analytical and operational workloads, not cost-effective for static archival. BigQuery is a data warehouse for analytics, and Cloud SQL is a relational database; neither is suitable for low-cost, long-term archival of static files.