Coal mine
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| Cost | $250, 1,000x wood |
| Inputs | N/A |
| Outputs | 8x coal |
| Production interval | 10 seconds |
| Profit/Min | $9.60 |
| True Profit/Min | $9.60 |
| Return of Investment/Min | 2.133...% |
| True Return of Investment/Min | 2.133...% |
| Aliases | coal mine, coalmine |
The coal mine is a facility that produces 8x coal every 10 seconds.
