| Production Scheme | Minimum Inventory (PTFE number) | Maximum Inventory (PTFE number) | Total Yearly Cost (US$ Millions) |
| 1 | 0 | 5 | 2.92 |
| 2 | 1 | 6 | 2.96 |
| 3 | 2 | 7 | 2.99 |
| 4 | 3 | 8 | 3.00 |
| 5 | 3 | 7 | 3.03 |