Which of the following must be included in a seller's annual report for contracts?

The correct choice emphasizes the importance of transparency and accountability in reporting the performance of contracts. Including the total number of contracts fulfilled in a seller's annual report provides key information regarding the seller's operations and effectiveness in delivering on their obligations. This data aids in evaluating the seller's business practices and ensures that stakeholders, including purchasers and regulatory bodies, are informed about how many contracts have been successfully completed within the reporting period.

In contrast, while the name and address of the financial institution might be relevant for financial audits, it does not directly assess the seller's performance. The date of birth of the purchaser contains personal information and is not pertinent to the operational aspects of the contracts. Lastly, the number of employees at the agency, while potentially useful for organizational insight, does not reflect the effectiveness of the contracts fulfilled during the year. Thus, the total number of contracts fulfilled stands out as the most crucial information needed for the annual report.