| First quarter | ||
| SEK M | 2011 | 2010 |
| Net sales | 69,956 | 56,459 |
| Cost of sales | (52,481) | (43,579) |
| Gross income | 17,475 | 12,880 |
| Gross margin, % | 25.0 | 22.8 |
| Research and development expenses | (3,309) | (3,004) |
| Selling expenses | (5,706) | (5,476) |
| Administrative expenses | (1,715) | (1,622) |
| Other operating income and expenses | (395) | 26 |
| Income (loss) from investments in associated companies | (19) | (19) |
| Income (loss) from other investments | 12 | 0 |
| Operating income | 6,343 | 2,785 |
| Operating margin, % | 9.1 | 4.9 |
| Operating income before depreciation and amortization (EBITDA) | 9,001 | 5,567 |
| EBITDA margin, % | 12.9 | 9.9 |