Use the following Excel formulation to obtain the optimal solution:
Solution:
Optimal Plan | Month 1 | Month 2 | Month 3 | Month 4 | Unused | Total | Capacity |
Beginning inventory | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Month 1 reg time | 225 | 0 | 0 | 0 | 0 | 225 | 225 |
Month 1 overtime | 15 | 0 | 0 | 0 | 0 | 15 | 15 |
Month 1 subcontracting | 0 | 0 | 0 | 0 | 12 | 12 | 12 |
Month 2 reg time | 0 | 275 | 0 | 0 | 0 | 275 | 275 |
Month 2 overtime | 0 | 24 | 0 | 0 | 0 | 24 | 24 |
Month 2 subcontracting | 0 | 17 | 0 | 0 | 0 | 17 | 17 |
Month 3 reg time | 0 | 0 | 300 | 0 | 0 | 300 | 300 |
Month 3 overtime | 0 | 0 | 26 | 0 | 0 | 26 | 26 |
Month 3 subcontracting | 0 | 0 | 10 | 0 | 8 | 18 | 18 |
Month 4 reg time | 0 | 0 | 0 | 300 | 0 | 300 | 300 |
Month 4 overtime | 0 | 0 | 0 | 5 | 23 | 28 | 28 |
Month 4 subcontracting | 0 | 0 | 0 | 0 | 15 | 15 | 15 |
Total | 240 | 316 | 336 | 305 | 58 | ||
Demand | 240 | 316 | 336 | 305 | 58 | ||
Total Cost | $1,094,700 |
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