| Powierzchnia (m2) ni wi wi cum xi xi*ni ai ai cum pi | |||||
| 20-40 7 0 | 25 0 | 25 30 210 0 | 25 0 | 25 0 | 625 |
| 40-60 8 0 | 285714286 0 | 535714286 50 400 0 | 285714286 0 | 535714286 0 | 224489796 |
| 60-100 5 0 | 178571429 0 | 714285714 80 400 0 | 178571429 0 | 714285714 0 | 223214286 |
| 100-150 4 0 | 142857143 0 | 857142857 125 500 0 | 142857143 0 | 857142857 0 | 224489796 |
| 150-200 3 0 | 107142857 0 | 964285714 175 525 0 | 107142857 0 | 964285714 0 | 195153061 |
| 200-300 1 0 | 035714286 1 250 250 0 | 035714286 1 0 | 70153061 | ||
| 28 1 2285 1 |