Question
List the different cases which are suitable for collecting primary data through telephone interviews.
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| Output (Units) | Total Revenue (₹) | Total Cost (₹) |
| 1 | 7 | 8 |
| 2 | 5 | 10 |
| 3 | 4 | 12 |
| 4 | 2 | 15 |
| 5 | 1 | 16 |