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COMMITMENTS AND CONTINGENCIES: - Labor matters (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2022 PEN (S/) | Dec. 31, 2022 USD ($) | Mar. 31, 2023 item | Sep. 30, 2023 item employee | Dec. 31, 2021 PEN (S/) item | Dec. 31, 2021 USD ($) item
Labor matters |  |  |  |  |  |
Compliance with Arbitration Award, Compensation Bonus Paid to Each Employee | S/ 4,000 | $ 1,101 |  |  |  |
Compliance with Arbitration Award, Signing Bonus Paid to Each Employee | S/ 1,000 | $ 275 |  |  |  |
Ilo and Cuajone |  |  |  |  |  |
Labor matters |  |  |  |  |  |
Number of labor unions |  |  | 6 |  |  |
Peru | Labor Matters |  |  |  |  |  |
Labor matters |  |  |  |  |  |
Percentage of labor unionized |  |  |  | 68.60% |  |
Total number of workers | employee |  |  |  | 4,456 |  |
Number of labor unions |  |  |  | 6 |  |
Number of labor unions represent majority of workers |  |  |  | 0 |  |
Extended term of agreement |  |  |  |  | 6 years | 6 years
Annual salary increase (as a percent) |  |  |  |  | 5.00% | 5.00%
Number of labor unions of collective agreement signed |  |  |  |  | 6 | 6
Long term agreement bonus |  |  |  |  | S/ 10,000 | $ 2,753
Peru | Labor Matters | Minimum |  |  |  |  |  |
Labor matters |  |  |  |  |  |
Term of agreement |  |  |  |  | 3 years | 3 years
Labor expense |  |  |  |  | S/ 45,000 | $ 12,386
Peru | Labor Matters | Maximum |  |  |  |  |  |
Labor matters |  |  |  |  |  |
Term of agreement |  |  |  |  | 6 years | 6 years
Labor expense |  |  |  |  | S/ 90,000 | $ 24,773

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