A company is moving processed data from an Amazon S3 bucket in one region to compute instances for analysis in the same region. After processing, results are stored in another S3 bucket in a different geographic location. A task was assigned to project the potential data transfer charges for this architecture. Which aspect of this setup should you consider as possibly incurring additional data transfer charges?
Storing the processed results into S3 in a regional location different from the processing location
Data ingress into S3 from external sources
Data movement from S3 to local compute instances within the same region
Retrieving data for processing from the S3 bucket within the same regional boundary