| Clue | Source | Date |
|---|---|---|
| The going rate? | Thomas Joseph | 16 Dec 2021 |
| Going rate? | The Washington Post | 15 Jun 2017 |
| Going rate? | LA Times Daily | 15 Jun 2017 |
| Going rate? | ||
| Meter reading | Wall Street Journal | 12 Nov 2016 |
| Meter reading | ||
| Expense account item | ||
| Expense account item | ||
| Hack's income |