Explain how the data in Extract A show that the rural broadband provider, Rural Broadband Link (RBL), has exploited its monopoly market power.
| 2018 | 2019 | 2020 | 2021 | 2022 | |
|---|---|---|---|---|---|
| Average annual subscription fee per household (£) | 420 | 450 | 480 | 510 | 550 |
| Average infrastructure & network cost per subscriber (£) | 310 | 290 | 280 | 275 | 270 |
| Company operating profit per subscriber (£) | 20 | 60 | 90 | 120 | 160 |