The net profit margin is calculated as:
Net Profit Margin=Net ProfitTotal Sales×100\text{Net Profit Margin} = \frac{\text{Net Profit}}{\text{Total Sales}} \times 100Net Profit Margin=Total SalesNet Profit×100 The given data shows:
* Gross profit margin (Revenue - Cost of Goods Sold) remained constant at 40% in both years.
* Net profit margin declined from 18% in Year 1 to 13% in Year 2.
Since the gross profit margin remained unchanged, the cost of sales did not increase relative to sales. This eliminates Option A as a possible cause.
* A decline in net profit margin while gross profit remains the same suggests an increase in operating expenses, interest, or taxes.
* If the government increased the corporate tax rate, net income after taxes would be lower, leading to a reduced net profit margin.
* The IIA's GTAG 14 - Auditing Governance, Risk, and Compliance recommends analyzing external factors like tax rate changes when evaluating financial performance.
* A. Cost of sales increased relative to sales # Incorrect. If this were true, gross profit margin would have declined, but it remained stable.
* B. Total sales increased relative to expenses # Incorrect. If sales increased while expenses stayed constant, net profit margin would have increased, not decreased.
* C. The organization had a higher dividend payout rate in year two # Incorrect. Dividends do not affect net profit margin, as they are paid out from net income after it is calculated.
* IIA Standard 2120 - Risk Management states that auditors should analyze changes in financial performance due to external economic factors.
* COSO ERM Framework highlights tax rate changes as a key risk factor in financial analysis.
* IFRS (International Financial Reporting Standards) require companies to disclose changes in tax rates and their impact on profitability.
Why Option D is Correct?Explanation of the Other Options:IIA References & Best Practices:Thus, the correct answer is D. The government increased the corporate tax rate.