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Journal of Applied Mathematics
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Journal of Applied Mathematics
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2014
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Article
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Tab 6
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Research Article
Evaluation of Underground Zinc Mine Investment Based on Fuzzy-Interval Grey System Theory and Geometric Brownian Motion
Table 6
Operating costs over production period 2017–2021.
2017
2018
2019
2020
2021
(mill’s USD)
2.965, 3.845
2.956, 3.956
2.956, 4.029
2.952, 4.208
2.968, 4.301