What impacted O'Reilly's operating margin in Q4 2023?

O'Reilly's operating margin in Q4 2023 was 18.91%, which is a healthy figure, but to determine what impacted this margin, we need to analyze the following key components:

1. **Operating Income**: O'Reilly reported an operating income of $664.57 million for the quarter. This is a positive indicator, suggesting that the company was profitable during the period.

|code|Ticker|Name|Date|Operating Profit Margin|Operating Income|market_code|
|---|---|---|---|---|---|---|
|ORLY|ORLY.O|O'Reilly Automotive|2023 Q1|18.14902056817618|6.72941E8|185|
|ORLY|ORLY.O|O'Reilly Automotive|2023 Q2|19.003658934106397|8.04946E8|185|
|ORLY|ORLY.O|O'Reilly Automotive|2023 Q3|19.4072987716852|8.47153E8|185|
|ORLY|ORLY.O|O'Reilly Automotive|2023 Q4|18.90691078119812|6.64568E8|185|

|code|Ticker|Name|Date|Cost of Goods Sold|Total Revenue|market_code|
|---|---|---|---|---|---|---|
|ORLY|ORLY.O|O'Reilly Automotive|2023 Q1|1.817535E9|3.707864E9|185|
|ORLY|ORLY.O|O'Reilly Automotive|2023 Q2|1.982409E9|4.068991E9|185|
|ORLY|ORLY.O|O'Reilly Automotive|2023 Q3|2.042917E9|4.20338E9|185|
|ORLY|ORLY.O|O'Reilly Automotive|2023 Q4|1.864586E9|3.832015E9|185|

2. **Total Revenue**: The total revenue for the quarter was $3.83 billion. This indicates a strong sales performance, which is a positive factor for the operating margin, as it suggests the company is generating substantial revenue to cover its operating expenses.
3. **Cost of Goods Sold (COGS)**: O'Reilly's COGS for the quarter was $1.86 billion. This represents the direct costs associated with the sale of goods. A higher COGS can negatively impact the operating margin if the increase is not matched by a corresponding increase in revenue.
4. **Other Factors**: Operating margin can also be impacted by factors such as operating efficiency, marketing expenses, administrative costs, and any one-time expenses. Without specific data on these items, it's not possible to provide a comprehensive analysis.

In conclusion, O'Reilly's operating margin in Q4 2023 was likely impacted by the balance between its operating income, revenue, and COGS. A detailed analysis of the company's financial statements and market conditions would be necessary to identify specific factors that influenced the operating margin.