Final answer:
The control that sums the number of items in a batch for data entry is the record count. It confirms the quantity of processed items, which differs from financial totals, hash totals, and sequence checks.
Step-by-step explanation:
The batch processing data entry control that sums the number of items in a batch is known as the record count. This control is a simple method that involves counting the number of records or items and provides a way to verify that all data has been processed correctly. Unlike a financial total which sums up monetary amounts, or a hash total which may sum up non-financial numbers for verification, the record count is specifically for the quantity of items. A sequence check, on the other hand, refers to verifying that a batch of records is in a specific numerical or alphabetical sequence.