| | Third Quarter | | | First Nine Months | | | | --- | --- | --- | --- | --- | --- | --- | | (in millions) | 2025 | 2024 | Change | 2025 | 2024 | Change | | (1) Volume | 92.8 | 89.9 | 3.3% | 260.3 | 263.4 | (1.2)% | | Net sales | $1,888.3 |$1,765.7 | 6.9% | $5,323.8 |$5,153.2 | 3.3% | | Gross profit | $748.5 |$698.0 | 7.2% | $2,118.1 |$2,055.3 | 3.1% | | Gross margin | 39.6 % | 39.5 % | | 39.8 % | 39.9 % | | | Income from operations | $246.6 |$227.1 | 8.6% | $708.5 |$701.6 | 1.0% | | Operating margin ...