PPG manufactures an epoxy amine that is used to protect the contents of polyethylene terephthalate (PET) containers from reacting with oxygen. The cash flow (in millions) associated with the process is shown below. Determine the rate of return.
| Year | Cost, $ | Revenue, $ |
| 0 | –10 | — |
| 1 | –4 | 2 |
| 2 | –4 | 3 |
| 3 | –4 | 9 |
| 4 | –3 | 9 |
| 5 | –3 | 9 |
| 6 | –3 |
9 |
