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Suppose we are considering the question of how much capacity to build in the face of uncertain demand. Assume that the cost is $20 per unit of lost sales due to insufficient capacity. Also assume that there is a cost of $7 for each unit of capacity built. The probability of various demand level is as follows:
| Demand-X Units | Probability of X |
| 0 | 0.05 |
| 1 | 0.1 |
| 2 | 0.15 |
| 3 | 0.2 |
| 4 | 0.2 |
| 5 | 0.15 |
| 6 | 0.1 |
| 7 | 0.05 |
How many units of capacity should be built to minimize the total cost of providing capacity plus lost sales?