dij | B1 | B2 | B3 | B4 | Surplus quantity |
A1 | 5 | 10 | 15 | 12 | 600 |
A2 | 8 | 10 | 7 | 9 | 800 |
A3 | 6 | 5 | 10 | 8 | 1200 |
Shortage quantity | 300 | 500 | 1000 | 800 |
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