During a period of rising material costs, FIFO assigns the oldest and lower costs to cost of goods sold, while the newer and higher costs remain in ending inventory. This produces a lower cost of goods sold and therefore a higher gross profit and net income compared with average-cost methods. Specific identification depends on the actual units sold and does not necessarily produce the highest profit unless management selects lower-cost units. Weighted average smooths cost changes and usually produces profit between FIFO and newer-cost methods. Internal auditors should understand inventory valuation because it affects profitability, taxes, inventory carrying value, financial ratios, and management incentives. Since FIFO produces the highest profit in a rising-cost environment, Option C is correct.

The clearest indicator of direct cost savings is that the organization captured early-payment discounts on eligible invoices. Paying invoices in time to obtain discounts reduces the actual cash paid and generates measurable savings. No duplicate payments and matching invoice amounts are important controls, but they indicate payment accuracy rather than active savings. Paying 95% of invoices by the due date indicates timeliness and avoids penalties, but it does not necessarily show savings. Internal auditors reviewing accounts payable efficiency should evaluate discount capture, duplicate payment prevention, payment timing, vendor terms, invoice accuracy, and exception handling. Since early-pay discounts directly reduce expenditure, Option C is the best indicator that the organization is saving money.

Since senior management is about to make a final investment decision, they must be made aware of the transparency issue with tenders before approving the project. The CAE should raise the issue with senior management immediately, even if the full report is not yet complete, to ensure that governance decisions are based on accurate risk information.
Option A (risk officer) may be informed later but does not replace informing decision-makers. Option C ignores urgent risk exposure. Option D is incorrect because halting the audit would suppress critical information.
Reference:
IIA Standards - Standard 2060: Reporting to Senior Management and the Board.

The ability of user-developed spreadsheets to meet user needs is generally a benefit, not a concern.
Spreadsheets are often created because they are flexible, fast, and tailored to specific business requirements.
However, reliance on user-developed spreadsheets creates risks when they become increasingly complex, interface with corporate systems without proper controls, or contain hidden columns, formulas, worksheets, or undocumented logic. These risks can lead to errors, unauthorized changes, incomplete data, and unreliable reporting. Internal audit should evaluate spreadsheet governance, access protection, version control, formula integrity, review procedures, change tracking, and backup. Since meeting user needs is the positive reason spreadsheets are used, not a concern, Option C is correct.