Journal of Applied Mathematics / 2014 / Article / Tab 6

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.

20172018201920202021

(mill’s USD) 2.965, 3.845 2.956, 3.956 2.956, 4.029 2.952, 4.208 2.968, 4.301