| B1 | B2 | B3 | B4 | Surplus quantity |
A1 | 0 | 400 | 0 | 0 | 600 |
A2 | 250 | 0 | 350 | 0 | 800 |
A3 | 50 | 50 | 0 | 200 | 1200 |
Shortage quantity | 300 | 500 | 1000 | 800 |
|