| Item | 2017 | 2018 | 2019 | 2020 | 2021 |
|---|---|---|---|---|---|
| Sales | 261 | 470 | 625 | 502 | 482 |
| Gross profit | 94 | 101 | 142 | 92 | 125 |
| Gross profit rate | 35.9% | 21.5% | 22.7% | 18.3% | 25.9% |
| Selling expenses & administrative expenses | 62 | 80 | 80 | 78 | 56 |
| Operating income | 32 | 21 | 62 | 13 | 68 |
| Operating income rate | 12.1% | 4.4% | 10.0% | 2.6% | 14.1% |